Float represents the amount of time a particular task can be delayed without jeopardizing or delaying the entire project. Free CAPM® Exam Newsletter; All Free PDU Resources. 5% = 47. Free Float Calculation As. Refer to the post Total Float vs Free Float for float formulas and calculations shown in the above examples. For example, a project with 10 stakeholders has 10 (10 – 1) /2 = 45 likely communication channels”. Late. Slack or float time for an activity is the difference between its early start and early finish, or the difference between its late start and late finish. Earliest and latest time value & total float are calculated as follows: Hence critical path for normal network is 1-2-5-6-7-8 along which activities have ‘o’ total float. Actual Cost (AC) = $60,000. b = -22. Adjust the schedule and cost baselines based on past performance. Free float is often associated with activities NOT on the critical path. Take the Task B, for it total float = LS. It also includes definitions and formulas that can be used for solving. Each activity in Network Diagram is. ‘A’ is scheduled for Monday and Tuesday, ‘B’ for Wednesday and Thursday. The process of schedule development includes: identification of all activities, sequencing all activities based on dependency, estimating duration of each activity and finalizing the schedule. We discuss three types of Floats in this video viz Total Float, Free Float and Independent Float with examples. Open, Click, Convert: Elevating Your Small Business with Email Marketing Tactics November 21, 2023. It’s one of the most important PMP formulas and we use it to calculate duration, cost, and resource estimates. Required fields are marked. E. Online PMP Training Master of Project Academy Material - Cannot Be Sold, Copied or Redistributed. . + 3 σ. Standard Deviation SD = (Tp – To) / 6 while. 2. By Praveen Malik, PMP July 22, 2023. Free float refers to the number of days that tasks can be delayed without impacting the start date of subsequent activities. This technique involves mathematical calculations, and that is why many PMP aspirants ignore this concept. PERT formula example for project managers. 3. I have also compiled a PMP Formulas Cheat Sheet. In project management, float is used to denote the extra time that a project task, a branch of project tasks, or the entire project can be extended by. Calculation. This video delves deeper into calculating the Critical Path on your Schedule Network Diagram by using the Forward and Backward pass. Planned Value (PV) = 50% of $100,000 = $50,000. ETC = Re-estimate manually. Calculation: (Early start date of next task) – (early finish date of current task) Tasks on the critical path have a float of zero, meaning that if one task is delayed, the rest of the project is delayed as well. Free float, or free slack, is an important resource that project managers should consider. In the recent past, there have been many questions coming from a relatively unknown term – Point of Total Assumption (PTA) on the PMP Exam. Float management is a project management style known for its flexibility. Businesses track it using a platform dashboard. Therefore, 9 weeks is the estimated amount of time of work verified with the PERT formula. O = Optimistic. – Pg 201, PMBOK 6th Edition. During the forward pass calculations, Microsoft Project adds the task duration to the early start to. Link gaps are keys in GPM calculations, as all floats and drifts originate at the gap level. or. GPM® and Forensic Total Float By Dr. Please note that if two activities converge into a single activity, only one of these two activities may have a free float. Total Float and Free Float for an activity may be the same or different depending on the other activities in the schedule diagram. Keep calm and study on and get PMP certified!. Positive total float is caused if the backward path is calculated from a schedule constraint that is later than the early finish date calculated by the forward path. g. Don't worry—it's not too tough. In this scenario, the project manager can use the same CPI formula for the PMP® exam, in that CV = AC/EV. If the current interest rate is 6% and the return. LS (Late Start) – ES (Early Start) or LF (Late, Finish) – EF (Early Finish) Download the excel sheet : PDM METHOD. Pierian Training My Management Academy Six Sigma Online Uniform Training Velopi Watermark Learning Here is once again my standard answer, copied from our PMP Exam Formula Study Guide, which you can find at : There are two approaches for calculating ES, EF, LS and LF: • First approach: You calculate the network diagram starting on day 0. or if you need arbitrary precision use. Some of these questions are based on 3-Point Estimate. Here, the free float calculation formula is: Free float = (earliest start of the dependant task) - (earliest finish of current activity) Project float. Tags: PMP Schedule Management. A note on PMP® Exam. Free float is the amount of time that a scheduled activity can be delayed without delaying the early start date of any successor or violating a schedule constraint. students. 67. Within this study guide, note that PMP®. PM PrepCast Reviews. Free Float (slack): The amount of time the activity can be delayed without delaying the early start date of the successor(s)PERT and the PMP® Certification Exam. Free CAPM® Exam Newsletter; All Free PDU Resources. . Successfully answer the Project Management math and technical questions on the CAPM and PMP exams. Let’s look at the four top benefits of introducing float to your project management. Slack is also another name for float calcul. In preparing for the PMP certification exam, you should be sure to include the definition of float types, the formulas for float types, the scheduling concepts connected to float, and the concept of “free float vs total float PMP” in your study materials. Project Scope Management and Its Importance in 2023. PERT formula to estimate project completion time. Simply put, it is the estimated cost of all the work to be completed during the project. Hi folks, I saw a post on this sub from about a year ago stating that there really aren’t any calculation questions (e. You can calculate the total float by subtracting the Early Start date of an activity from its Late Start date. The formula is : PERT = (Optimistic + 4 x Most Likely + Pessimistic) / 6. It considers the resource availability while drawing the network diagram. Elements within a question can indicate if Beta Distribution using PERT is the best tool, e. PERT analysis PMP exam questions may include the need to calculate estimates using the formula or interpretation of graphed or charted data. To make the most of the float, it’s. Estimated Time: T e = (T o + 4×T m + T p) ÷ 6. EMV PMP Exam formula. The calculation of Total Float in a PDM network is contained within the activity and is basically the same as for an ADM activity. 6). PMP, PSP, PMI-SP. 1". On the CAPM or PMP exam, however, candidates will be expected to calculate float manually. They are as follows: Total Float (TF): The maximum delay or relax provided to any activity without affecting the project duration. Total Float vs Free Float is one of the most important concepts in PMP Certification training. com, 347-536-2811 4 Project Management Professionals Hot Topics & Challenges - Time Management Float/Slack or Buffer Calculation: Activities in the critical path have no float as any delay will increase the duration of the project. . We have written a post that explains how to elaborate the project network diagram step by step. Step 3 – Find the next longest path and find the float. This paper examines how project managers can use the graphical path method (GPM), a tool that can help them solve scheduling problems via a forensic total float approach which can also help them to. Key Critical Path Terms for the PMP Exam. It is the best and most comprehensive cheat sheet based on the PMBOK Guide 6th edition. Check out for more free engineering tutorials and math lessons!Project Management Tutorial: What is total float (total slack) an. Any delay in an activity on. July 25, 2017 May 20,. Are you planning on becoming a certified PMP. Simple Formula Questions Part 2 – Calculating Float. Method 3 if EAC is valid then; ETC = EAC – AC. A (Worley & OCP JV) Published Sep 22, 2017INDEPENDENT FLOAT. Late Finish – Late Start or Early Finish – Early Start B. The different Types of float are Free Float, Total Float, Project Float, Interfering Float, Independent Float. The PERT Formula. com, 347-536-2811 Agenda Network Diagram Critical Path, Near Critical Path Benefits of Critical Path Buffer/ Float Calculation Early Start, Early FinishNo one likes to do it, but often it’s necessary and worth it in the end. a = 55. This might cause a situation called negative float. Assemble two-tier bridge. Float. It shows the interdependencies of activities and is used in schedule development. Charlotte, NC 28210 Phone: 704-916-6765. The whole idea of network diagram and finding the project duration is to identify the critical path and total float. Understand what critical path means, consequences for it getting off track and also understand schedule. See below a link to a youtube video that shows an example how to calculate these. Float, sometimes called slack, is the amount of time an activity, network path, or project can be delayed from the early start without changing the completion date of the project. total float. and the project completion date. Learn the key differences between these 2 project terminologies in this article. Float and Free Float is one of the sources to make such adjustments. Determine how many resources are required to complete the project according to the project baseline. Login to your account. Choose Tools, Schedule. Critical Path Method Schedule Analysis Free Float Calculation. Formula for Slack Time. The critical path method is used to calculate the critical path in our project, and the amount of free float and total float, which is the flexibility that we have in our schedule. Calculate Free Float: To determine the Free Float for any task, subtract its Early Start date from its Late Start date and subtract one day as its delay without. . ) 1. Alternatively, slack time can also be calculated as the difference. Float is a numerical value representing the maximum amount of time a task can be delayed before it causes a domino effect, delaying the start of other tasks. To calculate the float and slack using a network diagram, you need to perform two calculations: the forward pass and the backward pass. Calculation. Project Management Basics – Introduction and. critical path. Both of these formulas produce the same result. Float is also known as slack. The most well-known IEEE754 floating-point format ( single-precision, or "32-bit") is used in almost all modern computer applications. When you schedule a project, you can choose to calculate multiple critical float paths. Float, also known as 'slack,' is a scheduling concept used to determine the flexibility and availability of time for a specific activity or task in a project. The value of Float should be zero on a critical path. The project management plan specifies that a predictive development approach has been selected to produce the project deliverables. Once these task sequences or paths. g. The exam consists of 200 multiple-choice questions that outline the five process groups (Initiation, Planning, Executing, Monitoring and Controlling, and Closing) and nine knowledge areas. Free PMP® Practice Exam; The Free PM PrepCast; Free PMP® Exam Guides; Free PMP® Exam Newsletter; Free PMP® Webinars; All Free PMP® Exam Resources. A buffer is more focused on inaccuracies and takes into account the contingencies. PERT charts serve multiple purposes for the project manager. Getting certified as a project management professional is simple with Simplilearn's PMP Certification. As an example, try "0. There is both a backward and forward pass. In lead time, you have overlap between the first and the second activity, while in lag, there is a delay between the first and the second activity. Author P. Total float of an activity = (LF - EF) of that activity OR (LS-ES) of that activity. In contrast, the total float is a measure of a task's flexibility and how much it can be delayed without affecting the overall completion date of the project. Using the SPI formula, the project manager needs to determine how close to schedule the work is progressing. You may encounter one or. Free float: Early Start of next - Early Finish of current. In preparing for the PMP certification check, it's major to understand the use, connect, or differences of free float with. As mentioned previously, the benefit-cost ratio is expressed as a decimal. Step 1: Late finish of last activity on the critical path is same as its early finish. RPN = O x I. This is often used alongside the critical path method, which helps project managers schedule activities effectively and calculate how long it will take to complete a project. The Simons Company is always trying to get the best return on its investment. Slack or float time is the amount of time the task can be delayed without causing the overall project to take longer. You will need this for the PMP Certification Exam. How to calculate total float in project management. Network diagrams including float, free float, project float, leads and lags; Financial based questions. The formula looks like this: Scheduled work hours / company's full-time working hours per week. In fast-tracking, you review the critical path and list all vital activities. With the help of the assign operator and assign the floating point value to the variable. Activity A = 3 Days, Activity B = 2 Days, and Activity C= 3 Days. In the first part of the series, I talked about the Three. . Free PMP® Exam Guides; Free PMP® Exam Newsletter; Free PMP® Webinars; All Free PMP® Exam Resources. Free float is the duration that a task can be postponed without delaying the ES of the successor activity. A successful risk analysis has three steps: (1) create the CPM schedule for the project, (2) estimate the uncertainty in the activity durations, and (3) perform a risk analysis of the schedule, usually with a Monte Carlo simulation method available in several software packages. e. Float Calculation. 2. Total float is the total amount of time an activity on the schedule network diagram can be. You take the hours an employee works in a month and divide it by the total number of hours in a full-time schedule (typically 30 to 40 hours weekly). Total Float is the total amount of time a task can be delayed and still keep the project on schedule, while Free Float is the amount of time a task can be delayed without impacting other tasks in the project. Downloads. However values of a total free calculation example using activity. Float is how much time you have until a task will impact the due date of the project. 1+4+1=6. You can define lack or float time by the formula Float = LS - ES, or Float = LF - EF. Epperson Posted on April 19, 2017 Categories Schedule Review Process Tags Logic, Project Management, Schedule. Project Management Created on : December 2, 2019 Seema Sonkiya Updated on : July 4, 2023 0 Comments Project managers usually apply schedule adjustments to develop an efficient CPM schedule. Calculate the critical pathCalculate the Total Float (TF) and Free Float (FF) for each activity on the Network Diagram. Free float depends on efficient task. The following. when the INDF is a negative value, we set the value to zero. Step 2: Elaborate the network diagram. Reply: Free Float Calculation. LF = (lower) LS – 1. If you want to learn how to calculate TF and FF, refer to Total Float vs. Total float is the amount of delay that an activity faces without delaying the project completion date. Businesses track it using a platform dashboard. Free float, also known as project float, is the amount of time an activity can be delayed without delaying the early start of the next activity. So in this case for activity F, ES = 2+1 = 3 and EF = 3+3-1 = 5. Total Float: LS – ES = 17-7 = 10. Prepare for the important topic that is CPM & Float for CAPM certification. (Sometimes it seems that we try to make things. Float management helps you identify “float” or “slack” time within your project’s schedules, helps you work around delays, and streamlines your projects. On critical path LS = ES and LF = EF hence total float is equal to zero. Free CAPM® Exam Newsletter; All Free PDU Resources. Step 3: PDM Float Calculation for Each Activity. Various project management software tools can automate the calculation and tracking of float. pdf), Text File (. For non-critical tasks, there's float, which is a fancy term that means the extra time. Start a Blog. I have written this article to explain the difference between Total Float and Free Float in project Management. Skip to navigation. PMP Bootcamp , Sohel Akhter (PMP, ISMS, CCNA) - sohel_akhter_pm@yahoo. This video is based on Floats used in CPM(critical path method) from the subject Operation Research. The MS Project®version u. Each task’s float is the. Free Float = ES of successor activity – EF. Free Slack: The amount of time a task can delay without delaying the deadline of succeeding tasks is called free slack. PMBOK Guide definitions of Total Float and Free Float. 67. These dates cannot be any earlier than the early start and finish dates as the program is restrained by the network logic. The backward pass identifies your late start and late finish values, so that you can understand the project’s duration and eventually find the critical path. Current students can login to their portal to access more PMP formula based questions. Slack (float) , is the amount of time an activity, network path, or project can be delayed from the early start without changing the completion date of the project. . Using the formula and data above, we can expressed the exercise by: E = (7+4 * 9 + 11) / 6. Log inActual Cost (AC) = 60,000USD. Step 4 – Continue Step 2 until traversing through all the paths in the project. You use both of them while analyzing the project network diagrams and determining the critical path of a project. In figure 1, we started with zero and performed the forward and backward pass calculations. . The PMI’s A Guides to Get Bewirtschaftung Body of Information (PMBOK® Guide) uses day one of the get as one. Once backward pass and total float calculation is complete the resultant network diagram will look as follows. Find the project’s CV and figure out if you are over budget or under budget. The result of this subtraction is the float value for all the activities on the aforementioned. Note that float for critical path activities will always be zero even if they are common with the next longest (or any. ALL ABOUT CRITICAL PATH METHOD (CPM) SCHEDULE MANAGEMENT SCHEDULE MANAGEMENT: FAQs. Activity 5 has a float of 14 - 9, which is 5. Now total float is calculated as the difference between LS and ES or the difference between LF and EF. The critical path refers to the longest stretch of the activities, and a measure of them from start to finish. CPI = EV / AC. category. Float. This formula is a variant on the simple triangle version that puts more weight on your ‘most likely’ estimate. 1 hour. Amazon. Float project management helps you identify individual tasks and project “slack” — that’s how much time and leeway your task has – and helps you use this to determine whether a project schedule is viable and identify which tasks are on a “critical path”. 5. Total Float: The total amount of time that a schedule activity may be delayed from its early start date without delaying the project finish date, or violating a schedule constraint. They're a quick and easy reference to some key info, such as float calculation and earned value analysis. Lead is an advancement and is denoted by the “-” sign in the network diagram, for example, FS-2. Home » Forums » PMP Exam Preparation Forum » PMP / CAPM exam Question bank » formula for free float calculation formula for free float calculation Submitted by y0zh on Sat, 05/25/2013 - 18:20Download Solution PDF. It also includes definitions and formulas that can be used for solving PMP certification exam mathematical questions. Earned Monetary Value. We can identify two float types: free float and total float. Can negative float exist in a schedule network? What impact does it have? How does it impacts the critical path? As a Project Planner or Manager how should work on these cases?These were some of the questions that came up in a recent session on Practical PMP with MS Project. Can help to avoid rushing to complete tasks at the last minute. What are the PMP Formulas and What are the PMP Concepts? We use project management formulas in various project planning activities. → First of all, we will list out all_activity, their immediate predecessors, and completion time. This calculation has the same reason. The first problem I am seeing is that the float is increasing in the successor activities. The budget at completion (BAC) is the total amount budgeted for the project, in this case $60,000. Assign monetary value of the impact of the risk when it occurs. Float là gì và cách tính Float trong kỳ thi PMP. A project's critical path defines the sequence of tasks a team follows to complete the project. Step 1: Find Activities. content. Free float is a measure of a task's flexibility and how much it can be delayed without affecting other tasks. Free CAPM® Exam Newsletter;Home / Project Management / PMP / PMP Formula – 15 PMP Math Calculation & PMP Testing Cheat Sheet – FREE. Using the SPI formula, the project manager needs to determine how close to schedule the work is progressing. It is your authoritative source to all the formulas and values you need to master for the PMP ® Exam. 4 – Using Level of Effort in a progressed schedule + Compute float settings using the Late start – Early start. Leads, lags and float are used as part of activity sequencing process. By Praveen Malik, PMP July 22, 2023. Activity 2 is on the critical path so it will have a float of zero. Automated project dashboards can also provide real-time updates on task completion and their corresponding float times. There is no option for Longest Path with Microsoft Project. * Project Management Financial analysis tools (e. Illustrated Example EAD = (𝑂 + 𝑀 + 𝑃)/3. Join train engine and bogies. Total Float vs. TF (Total Float) = Simple formula to calculate total float is our usual formula i. Leads, lags and float are concepts used in schedule development process. Efficiency and productivity — you can use any float to ensure the most time-sensitive tasks stay on. Float is 0 on the critical path. Float is 0 on the critical path. Assemble two-tier bridge. Total float is the amount of time that an activity can be delayed without delaying the project completion date. The exam will be slightly cheaper, and you will be able to gain access to fantastic resources for free (including the PMBOK. The formula for calculating slack time (ST) is simple. How to Get Every Contract Calculation Question Right on the Pmp(r) Exam 2014-08-10 basic pharmacology and drug calculations is designed to assist students preparing for exam in pharmacology as a subject or in any related fieldsSimplilearn Solutions ((Global R. The formula used to calculate FTE is simple. Float. Link gaps are keys in GPM calculations, as all floats and drifts originate at the gap level. Use this handy worksheet to calculate the critical path and float for the tasks on your project. 5, 6. For example, when you’re making an omelet, “Heating the pan” has zero float since it is on the critical path. 68. You use both of them while analyzing the project network diagrams and determining the critical path of a project. If an activity is completed 2 days earlier in the critical path during execution, your near critical path can be the new PMP critical path of the project. You can add salt to the raw egg mixture, while the eggs are cooking, and even after they’ve cooked. Activities for this project are as below (output from Define Activities process) –. These are simple examples of expected monetary value analysis. Within the PMP® exam, formula questions fall into three general types: (1) PURPOSE, what the purpose of each PMP® formula is, (2) CALCULATION, what are values used to calculate PMP® formulas, and (3) APPLICATION, how a PMP formula applied. Finish to Finish (FF) is one of the four activity relationships of project management. DO sign up for PMP membership. 1- Free Float. ETC = Re-estimate manually. Or check out this playlist – Now that you know how to calculate Early Start, Early Finish, Late Start and Late Finish specifically from topic number 4, it is important to know that there are actually two ways to calculate these values, First approach – You calculate the network diagram starting on day 0. After you calculate the early and late start and finish dates, you can determine the float. Step 2: Calculate late start of this activity as the late finish minus activity duration plus 1. In project management, “float” or “slack” is the amount of time a task can be delayed without affecting the deadlines of subsequent tasks or the project’s final delivery date. Firstly, find the earliest dates each task can start and finish (known as the forward pass), and then determine the latest dates the task can start and finish. Free Float: The amount that a task can move without affecting other tasks. Step 2 – Find out the critical path. Unless specifically asked for free float in questions consider float=total float. The Free Agile PrepCast. Currently, as indicated on the company’s balance sheet, its total outstanding common shares number 500,000 (50,000 of which are held by the CEO and CFO of the company) while 80,000 shares are held in treasury. Early start and finish are calculated by forward pass through the network path, and Late start and finish are calculated by backward pass. Feasibility Study and Its Importance in Project Management Article. Float is the leeway that we might have – can we delay an activity by one day or two days? If there’s two days of float, then yes. Regardless of the inclusion of “PMP” in the name, the concept of variance at completion is the same and in fact, is one of twelve earned value metrics. (For this general discussion, Total Float and Total Slack are. The PMP®, or Project Management Professional, is an exam conducted by the Project Management Institute (PMI)®, a globally recognized certification. Remember MeEMV of all three events = EMV of the first event + EMV of the second event + EMV of the third event. To find a critical path on any project or given conditions, you need to follow the below steps; Step – 1: Construct a network diagram. The process of schedule development includes: identification of all activities, sequencing all activities based on dependency, estimating duration of each activity and finalizing the schedule. It’s useful to work this out at the start of the project to allow the team to stay agile and offer some flexibility when it’s. A Quick Guide to Project Cost Estimating. However, precedence diagrams can be labor-intensive and time. Total Float is the maximum amount of time an activity can be delayed without delaying the project whereas Free Float is the amount of time an activity can be delayed without impacting. Negative total float is caused if a constraint on the late date is violated by duration and logic. Microsoft Project only allows Total Slack less than or equal to 0 or a positive “x value”. PMP vs Certifications. 3. Log in. 3) Float or Slack. It can display the gaps between key activities, which, when added together, will provide total float. Free PMP® Practice Exam; The Free PM PrepCast; Free PMP® Exam Guides; Free PMP® Exam Newsletter; Free PMP® Webinars; All Free PMP® Exam Resources. Project managers usually apply schedule adjustments to develop an efficient CPM schedule. By definition, a float is a difference between the length of the critical path and the non-critical path. All you need to know is the right formula, and have a good understanding of the basic concepts to apply the formula in the right way. Project management formulas to calculate Estimate to complete (ETC) to complete the balance work. . In project management, float or slack is the amount of time that a task in a project network can be delayed without causing a delay to:: 183 . Risks can be hard to quantify. and. Negative float occurs in Primavera P6 when the total float is less than Zero, which means that the critical activities in the original plan (activity with zero total. Free float refers to the amount of time that a task can be delayed without having an impact on the deadline of the next task. Here are some key benefits float offers to your project management process: — float helps you accurately track the progress of tasks that impact your project the most, so you can adjust expectations and deadlines if and when delays occur. There are several different ways to calculate float. Both are calculated first for the critical. Assemble and add train station. CV = EV – AC. Many of these questions can be solved by using either PERT formula or Simple. The Simons Company is always trying to get the best return on its investment. Standard Deviation. The Free Agile PrepCast; Free PMI-ACP® Exam Newsletter; All Free PMI-ACP® Exam Resources. To sign up for a FREE course that will teach you how to get PMP or CAPM certified in the next 6 weeks, go to sure subscribe to. Check out for more free engineering tutorials and math lessons!Project Management Tutorial: Use forward and backward pass to det. First of all, float and slack are two words that mean the same thing. So Activity 1 has a float of 2. Primavera P6 allows us to define the Critical Path as either Longest Path or Total Float less than or equal to an “x value”. The critical path method (CPM), or critical path analysis (CPA), is an algorithm for scheduling a set of project activities. A 4x weighting is most commonly used, although you may see other weights. We have already discussed CPM(Critical path method) in pr. The three months have already passed now, the total amount spent during the period is USD 40,000, and 15% of. Skip to main content. Free PMP® Exam Guides; Free PMP® Exam Newsletter; Free PMP® Webinars; All Free PMP® Exam Resources. For example, if a contract specifies a completion date at the end of the year, but the planned completion date is mid-December, the terminal float is about two weeks. Negative float shows you where slack earlier in the. Critical actions are those absent flux. P. This can be calculated by using the formula: LF – EF = total float. Late finish – Early finish. If you understand this. The Free Agile PrepCast; Free PMI-ACP® Exam Newsletter; All Free PMI-ACP® Exam Resources. Free CAPM® Exam Newsletter;Login to your account. SPI = EV / PV. , experts are available, and the project is similar to other projects. It enhances your study experience and maximize your study efficiency by focusing in on. It provides a complete and in-depth explanation of different types of floats using examples, calculations and diagrams. Allows for more time to complete high priority tasks. The calculation starts with the last scheduled activity and proceeds backward through the entire schedule. Determine the critical path. Now that you have calculated ES and LS for each activity, you can find the float (or slack).