Operations Management questions and answers. Its EF is 9 + 5 = 14. Show ES/EF/LS/LF values for each activity Task Pred. Project Plan 365 works seamlessly on your Windows, Mac, iOS or Android devices. Use the following legend for filling out the AON network: Activity Duration ES Total Float EF LS Free Float LF SS 6 FS 7 с 10 F 4 K 10 FF 4. 3. The logarithmic equation is solved using the logarithmic function: x = log b b x. ES of activity F is calculated by adding 1 to the early finish of the predecessor activity. For the project in the table below: a) Draw the network diagram showing ES, EF, LS, LF, and the critical path. If you use the formula, LS-ES or LF-EF will get activity two has eight days float. Calculate the ES, EF, LS, and LF times and the slack for each activity in the figure below, and identify the critical path for the project, assuming must be done by 50 weeks (MUST SHOW WORK TO GET CREDIT – INCLUDE FORMULAS). Both of these formulas produce the same result. (d). Slack – Float (S): A period of time when an activity can be delayed without causing the entire project to be delayed. We will illustrate these concepts with an example: Critical Path Method (CPM): Any calculation method that shows the Critical Path in the schedule. b) Determine the total project completion time and the critical path for the project. 11: ES and EF times. (c) Identify the critical path. c. Operations Management questions and answers. Calculate Total Float (TF), Free Float (FF), Shared Float (SF), and Independent Float (IF) of each activity. let’s see how… You cannot delay activity two by eight days without slowing activity three’s early start of 17th. The LF of the last activity is its EF. c. ES kegiatan awal = 0 EF = ES + t (kegiatan i). Question: Assignment Using the figure below, answer the following: 1. Kỹ thuật này. Design DB 15 7 22 2 17-5 5. Identify the Critical Path, its duration and each activity's ES, EF, LS and LF values (10 marks), ii. (b) Determine the. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. 1. Prepare a precedence diagram showing the CPM Calculations and complete the CPM table using the following data. Chương 5 Ch Quản trị dự án. You will find cases on critical path calculation and more. Show the values in a table (activity schedule). Since Question 3: Develop a resource constrained schedule for the below. d) What is the probability of the project can be completed in 22 weeks or less?These can actually be calculated with a simple formula. The total project completion time and the critical path should also be determined. and slack for each activity. Rút ngắn thời gian hoàn thành dự án sao. 15 Dave Fletcher (see Problem 3. Also indicate the critical path on the network. TF = LS – ES. Its slack is 0. List activities Use a work breakdown structure to list all the project activities or tasks required to produce the deliverables. Final answer. Its LF is equal to. Use the project description presented in the table above for the following questions: (a) Calculate the expected time for each activity (b) Calculate the variance for each activity (c) Construct a network diagram Use both the longest path method and ES/EF; LS/LF method to answer the following questions and show answers in the table below. 8868. The total project completion time and the critical path should also be determined. Linear Programming. What is the expected completion time for the project? 4. Question 2: 50 points total. 4. a. This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. P, Q, R, X, Y, and Z. Complete the ES, EF, LS, LF and SL. TASK DURATION ES EF LS LF SLACK CRITICAL A 6 0 0 + 6 = 6 7 - 6 = 1 MIN LS (C & D) = 7 7 - 6. 8868. What is the critical path and its duration? ตารางค่า es,ef,ls,lf,tf,ff,if task d es ef ls lf tf ff es+d lf-d a 4 0 4 0 4 0 0 (a) 0 4 4 4 4 0 0 b 3 0 3 1 4 1 1 c 4 4 8 25 29 21 21 d 9 4 13 4 13 0 0 e 16 13 29 13 29 0 0 g 1 29 30 29 30 0 0 h 2 29 31 30 32 1 1 l 2 30 32 30 32 0 0 October 1, 2022. Here are the activity times: Dave's earliest start (ES) and earliest finish (EF) are:Here is a list of examples solved with our online calculators so that you can learn how they work: Choose the theme. c. Coordination of the architect and subcontractors will require. Then use the CPM formula to find the LS, which is LF – t. Through clicking on Add New Column from the table in right pane and choose columns of type numbers. Its LF is 9 + 5 = 14. Late Finish (LF): It is equal to the late start of the activity that follows. The total project completion time and the critical path should also be determined. Determine the probability that the project will be finished in 70 days or less. Question: Given the project activity information above, draw the project network diagram using the Activity-on-Node (AON) style using the symbols and format from the text and the lecture video. a) Draw the network diagram based on the information given below. A project consists of 11 activities, lettered A through K, below. (100 points) a. For the project in the table below: a) Draw the network diagram showing ES, EF, LS, LF, and the critical path. Draw the AOA network and identify the critical path. c) Prob (Complete in 30 units) Z = (30 - 26)/2. Chapter 3 or 9 Project Management How to calculate project scheduling duration Expected time ET of completion variance standard deviation, early start ES and. Chapter 3 or 9 Project Management How to calculate project scheduling duration Expected time ET of completion variance standard deviation, early start ES and. (a) Draw an arrow diagram for the project. Holgura total = LS – ES. , ES, EF, LS, LF, slack). Calculate the ES, EF, LS, LF, and Slack for each activity. A backward pass determines the dates for late starts (LS) and late finishes (LF). 1) Construct the project network 2) Show ES, EF, LS, LF, and slack for each activity on the project network chart 3) What are the critical activities? 4) How much time will be needed to complete this project? Show all your work and legend. Develop a table showing the activities of the project, the duration of each activity, the ES, EF, LS, LF and slack times. EF. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. a. (AOA) and (AON) Network Construction and Critical Path Calculations (Using Four Methods) EXAMPLE: Construct the (AOA) and (AON) networks for the project whose activities, their durations and their precedence relationships are as given in the table, also find: i) [ES, EF, LS, LF, Slack] for all activities. d. But this float is converting into free float. Question 3 Enter the ES, EF, LS, LF, and Slack for each activity. Free Float: The amount that a task can move without affecting other tasks. ) Use the following legend for filling out the AON network: ES Total Float EF LS Free Float LF Figure 2 SS 5 FF 4. Identify the critical path. The steps shown in the following table are to be planned. Here are the activity times: Activity Time (weeks) Immediate Predecessor (s) Activity Time (weeks) Immediate Predecessor (s) A 7 - E 5 B. Based on PM PrepCast and Formula Study Guide, here are the fomulas: EF = ES + Dur - 1 ES = EF of prev (largest) + 1 LF = LS of succ (smallest) - 1 LS = LF - Dur + 1 Float = LS - ES = LF - EF However, it was mentioned that there are other calculation methods, which where the Start Day is Zero. Your instructor will provide the answers. Calculate the ES, EF, LS, LF and slack for each activity and identify the critical path. What is the critical path of the project? 4. 1. For each activity, the preceding activity is given, and a deterministic estimate of the length of time required to complete it in weeks. Transcribed image text: Problem 5. ES of all other activites = EF (of previous activity) + 1. After we have determined the ES and EF for each activity, we are able to compute the LS and LF values for those activities. There are 2 steps to solve this one. To start the Backward Pass, make the last activities LF the same as its EF. Final answer. Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. LS. Find step-by-step Management solutions and your answer to the following textbook question: Dave Fletcher (see Problem 3. The activities necessary for the completion of this problem are listed in the table below (in weeks). For the following precedence diagram, perform forward and backward pass calculations and determine the project duration. I prefer to follow the convention that which you find in Rita's book, to calculate the ES, EF, LS, LF, FF, TF. Statistics. Critical Path: B - E - G and ES, EF, LS, and LF are indicated below. Tinh ES, EF, LS, LF, thai gian du tm toan phan va thai gian dir tnr tu do cua cac cong viec (1,5 diem). Total Flow demonstrates the distinction between the earliest and latest date the action can begin before the culmination date. 3. Question: Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. 22. Total Float shows the difference between the Earliest Start (ES) and Latest Start (LS) of an activity before the completion date is delayed. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. LF. answer below ». (b) Indicate the criticla path. . so the float of activity two is =6 days. Late Finish. Then do the CPM calculations and complete the table. Manually level your resources and improve the daily resource use (start low, increase the. Question: 2. 2. 3. b. Gravel roadway Compact road ES Du LS EF FF TFILE Set culvert Set entry gate 10 Purchase materials Layout work Stretch wire Move out Finish grade Dig post holes Set posts 12 Remove trees a) Complete the figure by finding ES, EF, LS, LF, FF, and TF. Read More ». Expert Answer. Find the critical path for the network. E D, F Yes 4 11 15 11 15 0 . The first day starts at 0. b) LF of activity g as calculated = 24 days. LF (latest finish time): 6. A marketing firm is developing a new Web-based media campaign for a client. 32 1. Your instructor will provide the answers. (b) Determine the ES, EF, LS, LF, and slack time for each activity. Free Float = Lowest ES of successors – EF. a) Determine ES, EF, LS, LF, and slack for each activity and then determine the total project completion time and the critical path for the project. Question: STUDENT EXERCISE Exercise #1 1. Late Start. Badri Construction Company (BCC) is building a luxury lakefront home in the Karaoun Lake region of West Bekaa. Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. For each activity, the preceding activity is given, and a deterministic estimate of the length of time required to complete it in weeks. Activity Time ES EF LS LF Slack. Question: 3 (4) Perform a project management analysis for the data given below to determine ES, EF, LS, LF, and slack for each activity, the total project completion time, and the critical path. Also calculate the ES, EF, LS, and LF for each activity: Activity Preceding activity Time (Weeks) A 7 B 8 C. This video demonstrates how to construct a PERT/CPM AON (Activity-on-Node) network diagram for a project consisting of 8 activities and how to determine the. Here are the activity times: Time Immediate Time Immediate. d) Determine the total project completion time and critical. Show the detailed calculation FF for each successor activities. 15 Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. Do problem 3. It’s also possible that you may have constraints added, removed, or modified into the project, which will impact these values. Metode Jalur Kritis Jalur kritis merupakan urutan kegiatan sangat penting untuk penyelesaian proyek agar setiap aktivitas tidak tertunda [10]. 8 and identify the critical path. Here are the activity times: Activity Time (weeks) Immediate Predecessor (s) Activity. We reviewed their content and use your feedback to. Late Finish (LF): The latest possible date that the task will be able to finish without affecting the overall project completion date. Try to solve this network diagram by yourself, this will help you to. Here are the activity times: egin{tabular}{ccc|ccc} hline multicolumn{2}{l}{ Activity }. Fill out the table for each day that the project is crashed. Activity E Activity E has one preceding activity, H. Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. Highlight the critical path. About you. For the \ nish" node (if there is one) ES is \=max(all EF entries)" This is also the max of all the entries in column G \Finish time" is calculated as the max of entries in the EF column, unless there is a preset nish time. E G 6. Its LF is determined by subtracting one from the previous activity's LS. The total project completion time and the critical path should also be determined. B 8 - F 6 B. Operations Management questions and answers. a) Develop the project network for this problem. Figure 1. What is the critical path(s)? Activities A and B start on day 0. Fletcher would like to delermine ES, EF, LS, LF, and stack for each activily. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. The total project completion time and the critical path should also be determined. Although there are a few steps, network diagrams are not very difficult to produce and a simple step by step process is not hard to remember. (See. Calculate the ES, EF, LS, and LF times and the slack for each activity in the figure below, and Activity C identify the critical path for the Activity A 13 project. Time (weeks) Predecessors Activity A Activity Time (weeks) Predecessors 5 E 3 B B 4 F 5 B C 2 A G 9 C, E D 1 A H 6 D, F (a) Draw a network with t, ES, EF, LS, and. Identify the critical path for each network Task 1 Activity Precedence Time (days) A. Node F. Late Start. IPE c. • Thời gian hoàn thành cả dự án = Max { EF của tất cả công việc} • Tổng Chi phí = Tổng chi phi 1của mọI công việc. For the \ nish" node (if there is one) ES is \=max(all EF entries)" This is also the max of all the entries in column G \Finish time" is calculated as the max of entries in the EF column, unless there is a preset nish time. Click the card to flip 👆. Add up to flow can likewise be ascertained as the contrast between Late Complete and Early Complete, as LS short ES and LF less EF calculate. Draw the following network using The Activity-On-Node method and determine the activity details ES, EF, LS, LF, TFt and FFt then locate critical path(s) considering the following data: This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Let’s look at the approach that some of the popular study guides and . After answering all ES and EF, We can now do the backward pass. These can actually be calculated with a simple formula. For A, EF is (0+1) = 1 week, and for B, it is (0+2) = 2 weeks. CPM Calcula: STUDENT EXERCISE Exercise #5 1. It stands for Early Start (Es), Early Finish (Ef), Late Start (Ls), and Late Finish (Lf). If your calculations result in a project schedule with negative total slack, revise the project scope, activity estimated. For Partially leveled schedule, what is the highest number of manpower are. 2. Question: 2. LS (latest start time): 4. note: If there are more than one LS answer to choose from, pick the lowest number. EF = ES + T e LS = LF – T e Where: T e is the expected time for that activity. Activity Time (weeks) Predecessors Activity Time (weeks) Predecessors E B 4 F 5 B с 2 A G 9 CE D A H DF (a) Draw a network with t, ES, EF, LS, and LF (follow. One mistake here will cause you to miss several later questions. Please use the table format presented in the text to solve this problem. Pls. Previous question Next question. Refer to the following network diagram. Show the variance for each activity and compute for the total project variance. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. The backward pass assigns the last activity’s EF as its latest finish. Kelonggaran waktu bebas hanya terjadi saat dua atau beberapa aktivitas memiliki tugas lanjutan yang sama. If no lag is mentioned, it is zero. Find v (t) for t>= 0. Late Start (LS): It is equal to the Late Finish minus its duration (t). Biết cách dùng PERT để hoạch định, giám sát và kiểm soát các dự án 2. This is highly useful as schedules changes over the course of a project/program. How to find the critical path Finding the critical path involves looking at the duration of critical and non-critical tasks. When the switch is opened, find the time constant. Free Float represents the amount of time that an activity can be delayed before any successor’s activity will be delayed. 6. LS = LF – t. 0E+18 fL. Biết cách dùng PERT để hoạch định, giám sát và kiểm soát các dự án 2. Free float: Free float is the amount of time a task can be delayed without affecting the next activity in the sequence. 2- Project duration 3- Critical path Activity. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. 1. Early Finish (EF): Earliest date that the activity can finish. First, from the Gantt Chart view you need to add 4 custom columns for (ES, EF, LS, LF). LS(H) = 11. Show transcribed image text. Also determine the total project completion time and the critical path (s). 12) was able to determine the activity times for constructing his laser scanning machine. State the non-critical activities. Tasks that are on the critical path have identical LF and EF values. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. Task ES EF LS Float A B A B С D A B Time (day) 2 12 6 4 6 B 2 D D C G 3. (LF = Last Finish Time) Slack Times. Perform CPM calculation using forward pass and backward pass method and complete Table 1(b). Calculate the ES,EF,LS,LF and Slack time for each node. If the first activity's duration is 7 days, then its ES = 0 and EF = ES + Duration = 0 + 7 = 7. d) What is the critical path for the project? e) How long do you expect the project to take to complete? We have an Answer from Expert. Click on formula button from Custom Attributes. The total project completion time and the critical path should. All Free PDU Resources. EF (a) Develop a project network for this problem. In our example, the next Activity in the critical path is Activity 3. Fletcher would like to determine ES, EF, LS, LF, and slack forea activity The total project completion time and the critical path should also be determined. Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. c) LF of activity h as calculated = 38 days. Calculate the ES, EF, LS, LF, TF, FF, project duration, and critical path on the network diagram below. Optimization methods with objective function and constraints. e. Use the following legend for filling out the AON network: Duration Activity Total Float ES EF LS Free Float LF SS 6 FS 7 с 10 F K 10 FF 4 SS3 SS 3 SS 3 FF 3 5. x = b l o g b x. Final answer. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. Conduct a forward and backward pass (calculate ES EF, LS, LF) 4. Its ES is the EF of activity A, which is 9. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. Question: PROJ1 - Case Study 4 1. Construct. Early Start. 2. See Answer. Draw the network diagram and calculate your critical path and completion time. The times are estimated and provided in the network below. Transcribed Image Text: Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. Then draw a time‐scaled network and under it a labor resource. standard normal table. Here are the activity times: C, E. Slack – Float (S): A period of time when an activity can be delayed without causing the entire project to be delayed. For the project depicted below, a) Compute the ES, EF, LS, and LF times for the network. Question: 4. Proper Use the following information and the “beginning-of-day” convention, draw AON diagram. Holgura de la actividad C = LS – ES = 5 – 5 = 0 dias For manual application of the critical path algorithm shown in Table 10-7, it is helpful to draw a square of four entries, representing the ES(i), EF(i), LS(i) and LF (i) as shown in Figure 10-14. Develop Output 10 10 20 9 19-1 7. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. 0 of a particular accounting software project is being considered by Jose Noguera's technology firm in Baton Rouge. The calculation begins at ES of the first action with 0 and moves forward through the schedule. For an activity, the total float can become free float if- Verified. Civil Engineering questions and answers. (c) Determine ES, EF, LS, LF, and slack time for each activity. Draw the network diagram based on the information given below. Determine ES, EF, LS, LF, and slack time for each activity. Draw the network b. #manpropolibatam Tedy dan Tiodora, mahasiswa Prodi Administrasi Bisnis Terapan, Politeknik Negeri Batam mempresentasikan penyelesaian kasus project time mana. The latest end date for activity C would be the latest start date of H i. A - Yes 6 0 6 0 6 0 . Here are the activity times: Dave's earliest start (ES) and earliest finish (EF) are:. For the Test & Commission Tank, the LF is 54 and, the LS is 50 (54 - duration of 4). This video shows how to draw network diagram and calculate early start (ES), early finish(EF), late start(LS), and late finish(LF) using forward pass and bac. Holgura de la actividad C = LS – ES = 5 – 5 = 0 diasFor manual application of the critical path algorithm shown in Table 10-7, it is helpful to draw a square of four entries, representing the ES(i), EF(i), LS(i) and LF (i) as shown in Figure 10-14. 3. The Green color represent the Forward Calculation EF = (ES + D) – 1, and the yellow color represent the Backward Calculation LS = (LF – D) + 1. 5. 2 13 h, 1 Use the network diagram to answer the questions below: 1. How many L in 1 fL? The answer is 1. insert into formula popup the right equation, as follows:Calculate the ES, EF, LS, and LF times and the slack for each activity in the figure below and identify the critical path for the project. The total project completion time and the critical path should also be determined. Mahmoud Abbas MahmoudWhen we have ES and EF of a particular node we can calculate the Total Float using the formula. . Backward pass steps: 1. Show the critical path. (enter as a probability and round your response to three decimal places). For the nish" node (if there is one) ES is =max(all EF entries)" This is also the max of all the entries in column G Finish time" is calculated as the max of entries in the EF column, unless there is a preset nish time. Question: Calculate the ES,EF,LS,LF and Slack time for each node: Activity Precedent Duration ES EFLSLF Slack C, D F, E. . Show how this changes the Value for ES, EF, LS, and LF. Here are the activity times: Activity Time (weeks mmediate. Show ES/EF/LS/ LF values for each activity Task Pred. b. To determine the ES, EF, LS, LF, and slack for each activity and the total project completion time and critical path, Dave Fletcher should use the Critical Path Method (CPM). Total Float = LF – EF. For calculating the duration of critical path and float, it doesn’t matter which approach you take as long as you use the right formula. Design I/O 3 7 10 6 9-1 4. Each activity's mean is given in the table above. 33 10Menghitung waktu proyek • Tahap I hitung ES dan EF (hitung maju), maksimum dari beberapa kegiatan • Tahap II hitung LS dan LF (hitung mundur), perhitungan dimulai dari kegiatan terakhir (EF=LF),menuju kegiatan pertama(ES=LS), minimum dari beberapa kegiatan. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. Backward pass: This is used to calculate late start (LS) and late finish (LF) dates. . Click on formula button from Custom Attributes. LS = LF - Duration. Chủ đề: cách tính es ef ls lf Cách tính ES, EF, LS, LF là một kỹ thuật quản lý thời gian rất hữu ích trong quá trình xây dựng. 0 (1 review) Get a hint. If two activities converge (i. Activity F. See Answer. (b) Calculate the total float and free float for each activity. Part 1: (See figure 1 – part 1 below). Here are the activity times: Dave's earliest start (ES) and. Question: Question 1: Draw the following network using The Activity-On-Node method and determine the activity details ES, EF, LS, LF, TFt and FFt then locate critical path(s) considering the following data: Duration Activity Depends on Relationship & Lag (days) A 8 B 5 с 4 D 10 A SS=4 A FS=2 E 7 B FF=1 B FS=2 F 8 C С FS=2 G 5 С FF=3 H 8 G FS=2. A future construction project has the following activity relationships and activity time estimates (in days): - Leave 2-decimal if not exact, do not round up, for example, 4. This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Calculate the ES, EF, LS, and LF times and the slack for each activity in the figure below and identify the critical path for the project. This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. As per the above diagram: There are 6 activities viz. The PERT/CPM chart has also been. Complete the ES, EF, LS, LF and slack times for each activity and answer the following question: What is the probability that the project will be completed in 24 weeks or less? Activity Optimistic Most Likely Pessimistic Immediate Predecessor А 3 4 5 B 6 7 14 А C с 5 6 13 A D 6 9 12 B E 4 8 12 B,C F 1 3 11 B,D,E B D IA TZ E 4 8 12 B,C F 1 3. c) Explain how the LF time for Activity 1 is obtained. (30 Points) a. Right Click column's header and choose Custom Fields. Question: Problem #4 - AoN Diagram - Simple Activity Relationships ( 20 points) Given the following activity-on-node (AoN) diagram complete the following: a. B 6 M 4 ID ES EF LS/ LF Dur TF/FF Link Lag. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Dave's earliest start (ES) and earliest finish (EF. Then show the effect of crashing each activity on the network by crossing out values and writing the new ones immediately above or below it, see example. After computing the ES, EF, LS, and LF times for all activities, compute the slack or free time for each activity - Slack is the length of time an activity can be delayed without delaying the entire project Slack = LS - ES or Slack = LF - EF. Also indicate the critical path of the network. Here are the activity times: Activity Time (weeks) Immediate Predecessor(s) A 5 − B 8 - C 3 A D 2 A E 3 B F 5 B G 10 C, E H 6 D,F a) Dave's earliest start (ES) and earliest finish (EF. EF (earliest finish time): 2. Show transcribed image text. Network 2 Activity Duration IPA Type Rel Lag ES EF LS LF TF FF А 4 B 3 C 8 А SF D 7 A,B E 6 SS 3 D D F 3 D G 5 F SS 2. Holgura total = LS – ES. All activities contained in the critical path have zero slack. • Can the project be completed in 30 weeks?Do the same for the LS. Here are the activity times: Immediate Predecessor(s) Time Activity (weeks) A 7 B 8 с 2 D 3 Time Activity (weeks) E 5 F 6 G 9 H 6 Immediate Predecessor(s) B B C, E DF A A Dave's. What is the expected completion time for the project? 3. 4 C 5 B 1 B SS FF SS FF D 12 с С 4 E 8 D 3 SS FF D 2 2. Recalculate the expected project completion time. Calcuate ES, EF, LS, LF for each activity and answer the following questions. Total Float = LS – ES or LF – EF.