University:
California State University, Northridge
Course:
SED 525SS | Methods of Teaching Social Studies
Academic year:

2024
Views:

144

Pages:

3
Author:

Amel S.

Earliest Event Time (EET) EET (Earliest Event Time) is the earliest completion time of the project. The calculation of the EET value uses forward calculations (Forward Analysis), starting from the earliest activity and continuing with the next activity. Figure 1. Forward Calculation Diagram Description: 1) Circles are also called nodes indicating the start or end of a job 2) Arrow lines indicate jobs, the direction of the arrow to a node indicates the sequence between jobs. 3) EETa: The earliest time the job starts 4) EETb: The earliest time the job ends 5) LETa: The latest time the job starts 6) LETb: The latest time the job ends 7) Duration: The duration of the job 8) N: Node identification number a. EET calculation The formula used in calculating the Earliest Event Time (EET) is: EETj = EETi + duration A. (2.1) EETk = EETj + duration B (2.2) In calculating EET, it is not done simply there are steps or procedures. The procedure for calculating the earliest start time (EET) is as follows. 1) Determine the number of events from left to right, starting from event number 1 in sequence to the maximum number of activities. 2) Determine the EET for event number one (leftmost) equal to zero. 3) Next, the EET value can be calculated for subsequent events using the available formula. If there are several activities including dummies (pseudo activities) leading to or limited by the same event, then the maximum EET value is taken. Example of EET Calculation Activity Name Previous Code Activity Creating specifications and A Time (Sunday) - 6 designs Generator factory B A 2 Buying foundation materials C A 1 Recruiting operators D B 4 Trial run E C 2 Making foundations F B 4 Training operators and mechanics G Generator transportation H D,E C 2 1 Table 1. List of Project Activities 1) The first step, creating a work network, based on the information in the table. Figure 2. Network 2) The second step, the network (network planning) is formed, then the next step is to calculate the EET based on the available formula. The calculation of EET can be described as follows. Figure 3. EET Calculation • EET1 = 0 (project start time) • EET2 = EET1 + duration A = 0 + 6 = 6 • EET3 = EET2 + duration B = 6 + 2 = 8 • EET4 = EET2 + duration C = 6 + 1 = 7 • EET5 = EET3 + duration D = 8 + 4 = 12 = EET4 + duration E = 7 + 2 = 9 To determine EET5, the maximum EET value of 12 is used. • EET6 = EET3 + duration F = 8 + 4 = 12 = EET5 + duration G = 12 + 2 = 14 = EET4 + duration H = 7 + 1 = 8 To determine EET 6, the maximum EET value of 14 is used.