Analysis of the project network

📘 Analysis of the Project Network (Software Project Management)

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🔹 1. Definition

Analysis of a Project Network means the process of examining the project network diagram to determine project duration, critical activities, scheduling, and resource planning.

👉 In simple words: It is used to understand how long the project will take and which tasks are most important.

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🔹 2. Purpose of Network Analysis

• To find project completion time
• To identify Critical Path
• To detect slack (float) in activities
• To improve resource allocation
• To support better scheduling decisions

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🔹 3. Key Steps in Project Network Analysis

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🔸 1. Forward Pass (Earliest Time Calculation) ➡️

Used to find:

• Earliest Start (ES)
• Earliest Finish (EF)

🔑 Formula:

EF = ES + Duration

👉 Starts from the beginning and moves forward.

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🔸 2. Backward Pass (Latest Time Calculation) ⬅️

Used to find:

• Latest Finish (LF)
• Latest Start (LS)

🔑 Formula:

LS = LF − Duration

👉 Starts from the end and moves backward.

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🔸 3. Float / Slack Calculation ⏱

Slack shows extra time available.

🔑 Formula:

Slack = LS − ES OR LF − EF

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🔸 4. Identify Critical Path ⭐

• Path with zero slack activities
• Longest duration path in the network

👉 This determines project completion time

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🔹 4. Example (Simple Network)

Activities:

Activity	Duration
A	2
B	3
C	4

Paths:

• A → B → C = 9 days

👉 Critical Path = A → B → C

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🔹 5. Diagram Description

📌 A project network diagram typically shows:

• Nodes → Activities
• Arrows → Dependencies
• Numbers → Time durations
• ES, EF, LS, LF written near activities

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🔹 6. Key Outputs of Network Analysis

After analysis, we get:

• 📅 Project duration
• ⭐ Critical path
• ⏱ Slack/float values
• 📊 Activity scheduling
• ⚠️ Bottleneck identification

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🔹 7. Importance of Project Network Analysis

• Helps in accurate project scheduling
• Identifies critical tasks (no delay allowed)
• Improves resource planning
• Reduces project risks and delays
• Supports CPM and PERT techniques

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🔹 8. Important Concepts

🔸 Critical Activities

• No slack
• Must finish on time

🔸 Non-Critical Activities

• Have slack
• Can be delayed without affecting project

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🔹 9. Common Mistakes

❌ Ignoring slack calculation ❌ Wrong forward/backward pass ❌ Misidentifying critical path ❌ Not considering dependencies

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🔹 10. Short Summary

• Project network analysis helps in scheduling and control
• Uses forward pass, backward pass, and slack calculation
• Identifies critical path and project duration
• Essential for effective project management

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🔹 11. Quick Exam Answer (2–3 lines)

Analysis of a project network is the process of determining project duration, critical path, and slack by using forward pass and backward pass calculations. It helps in scheduling activities and identifying critical tasks that affect project completion.

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🔹 12. Likely Exam Questions

1. What is project network analysis?
2. Explain forward pass and backward pass.
3. How is slack calculated?
4. What is the importance of critical path?
5. List the outputs of network analysis.
6. Differentiate between critical and non-critical activities.