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Scope Structure is the hierarchical and documented representation of the total scope of work, combining both:
Predictive elements (Scope Baseline, WBS, WBS Dictionary)
Adaptive elements (User Stories, Product Backlog) - Will discuss about these in the section 'Agile Project Management'
It answers:
What work needs to be done?
How is it organized?
How will it be delivered incrementally?
Scope Baseline
Scope Baseline
The Scope Baseline is the approved version of the scope that serves as a reference for comparison and control and comprises of;
Project Scope Statement
Work Breakdown Structure (WBS)
WBS Dictionary
These three together form the foundation for scope control.
Work Breakdown Structure (WBS)
Work Breakdown Structure (WBS)
The WBS is a hierarchical decomposition of the total project scope into smaller, manageable components.
It follows the principle: “Break the work until it becomes manageable and assignable”
100% Rule (Most Important Principle)
100% Rule (Most Important Principle)
Definition
The 100% Rule states that:
The WBS must include 100% of the work defined in the project scope, including all deliverables—internal, external, and project management work.
Key Aspects
Covers everything in scope
Includes project management activities
No extra work outside WBS
8–80 Rule (Decomposition Guideline)
8–80 Rule (Decomposition Guideline)
The 8–80 Rule suggests that:
A work package should ideally take between 8 and 80 hours of effort
Purpose
Ensures work is neither too large nor too small
If the work is more than 80 hours, it becomes too difficult to track and results in poor estimation
If the work is smaller than 8 hours, it results in too much micro-management
Levels in WBS
Levels in WBS
Level 1 → Project
Level 2 → Major Deliverables
Level 3 → Sub-deliverables
Level 4 → Work Packages
Lowest level = Work Package (manageable unit)
Work Breakdown Structure (WBS) – Solar Power Plant Project (50 MWp)
Work Breakdown Structure (WBS) – Solar Power Plant Project (50 MWp)
0.0 Solar Power Plant Project
0.0 Solar Power Plant Project
1.0 Project Management
1.0 Project Management
1.1 Project Planning & Control
1.1.1 Develop Project Management Plan
1.1.2 Develop Schedule Baseline
1.1.3 Cost Monitoring
1.1.4 Progress Reporting
1.2 Stakeholder Management
1.2.1 Stakeholder Identification
1.2.2 Communication Management
1.2.3 Regulatory Coordination
2.0 Engineering & Design
2.0 Engineering & Design
2.1 Site Studies & Assessment
2.1.1 Resource Assessment
2.1.2 Topographical Survey
2.1.3 Soil Investigation
2.2 Detailed Engineering
2.2.1 System Design
2.2.2 Electrical Design
2.2.3 Structural Design
2.2.4 Engineering Drawings & Calculations
3.0 Procurement
3.0 Procurement
3.1 Solar PV Equipment
3.1.1 PV Modules Supply
3.1.2 Inverters Supply
3.1.3 Mounting Structures Supply
3.2 Balance of Plant (BOP)
3.2.1 Transformers Supply
3.2.2 Cabling & Accessories
3.2.3 SCADA System
3.3 Services & Logistics
3.3.1 Transportation & Freight
3.3.2 Customs Clearance
3.3.3 Insurance & Handling
4.0 Construction & Installation
4.0 Construction & Installation
4.1 Civil Works
4.1.1 Site Preparation
4.1.2 Foundations & Concrete Works
4.1.3 Internal Roads & Drainage
4.2 Mechanical Installation
4.2.1 Mounting Structure Installation
4.2.2 PV Module Installation
4.3 Electrical Installation
4.3.1 DC Cable Laying
4.3.2 AC Cable Laying & Termination
4.3.3 Inverter Installation
4.3.4 Transformer Installation
5.0 Testing & Commissioning
5.0 Testing & Commissioning
5.1 Pre-Commissioning Tests
5.1.1 Equipment Inspection
5.1.2 Continuity Testing
5.1.3 Insulation Resistance Testing
5.2 Commissioning & Handover Tests
5.2.1 Performance Testing
5.2.2 Grid Synchronization
5.2.3 Reliability Testing
5.2.4 Final Commissioning
6.0 Operations & Handover
6.0 Operations & Handover
6.1 O&M Documentation
6.1.1 O&M Manuals
6.1.2 As-Built Drawings
6.1.3 Training Materials
6.2 Handover to Operations
6.2.1 Plant Acceptance
6.2.2 Final Documentation
6.2.3 Operational Readiness Review
Example WBS Dictionary Entry
Example WBS Dictionary Entry
WBS Code
WBS Code
4.2.2
WBS Title
WBS Title
PV Module Installation
Parent WBS
Parent WBS
4.2 Mechanical Installation
Objective
Objective
Install all solar PV modules according to approved engineering specifications.
Scope of Work
Scope of Work
Receive and inspect PV modules
Install modules on mounting structures
Perform alignment and torque checks
Record installation details
Deliverables
Deliverables
Installed PV modules
Installation quality records
Inspection reports
Responsible Party
Responsible Party
EPC Contractor
Estimated Duration
Estimated Duration
10 Days
Constraints
Constraints
Weather conditions
Availability of lifting equipment
Assumptions
Assumptions
Mounting structures completed
Modules delivered to site
Risks
Risks
Module damage during handling
Delays due to rain
Acceptance Criteria
Acceptance Criteria
Installation completed as per drawings
No visible defects
QA/QC approval obtained
Define Scope → Create WBS → Develop Schedule → Estimate Cost → Execute & Control
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