1. What is Earliest Expected Occurrence Time of Event i?

The Earliest Expected Occurrence Time of Event i (TEi) is the earliest expected time when event i can occur in a project network, considering the duration of activity i-j and the earliest occurrence time of event j.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( TE_i \) — Earliest Occurrence Time of i (Day)
• \( TE_j \) — Earliest Occurrence Time of j (Day)
• \( t_{ij} \) — Duration of i-j (Day)

Explanation: This formula calculates the earliest time event i can occur by subtracting the duration of activity i-j from the earliest occurrence time of the subsequent event j.

3. Importance of TEi Calculation

Details: Calculating TEi is crucial in project management for determining critical paths, identifying project milestones, and ensuring timely completion of project activities.

4. Using the Calculator

Tips: Enter the earliest occurrence time of event j (TEj) and the duration of activity i-j (tij) in days. Both values must be non-negative numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between TEi and TLi?
A: TEi represents the earliest possible occurrence time of event i, while TLi represents the latest allowable occurrence time without delaying the project completion.

Q2: Can TEi be negative?
A: No, TEi represents time and should be a non-negative value. If calculated TEi is negative, it indicates an error in input values.

Q3: How is this used in critical path method?
A: TEi calculation is fundamental in CPM for determining the earliest start and finish times of project activities.

Q4: What units should be used for time values?
A: While days are commonly used, any consistent time unit (hours, days, weeks) can be used as long as all values use the same unit.

Q5: How does this relate to project scheduling?
A: TEi values help establish the project timeline and identify activities that have flexibility (float) in their scheduling.