hi @geteway2digitalindia
This is a very good question and something we deal with on almost every BIM project. In our workflow, we create a detailed Work Breakdown Structure (WBS) in Microsoft Project (MSP) and estimate man-hours based on the project's specific needs.
Our approach follows the logic of real construction sequencing.
We first break the project into manageable sections, typically by:
Level
Zone / Area
Building / Block
Discipline (Architecture, Structure, MEP)
After that, each section is divided into category-based micro-activities, allowing for accurate measurement of modeling time.
For each micro-activity, we assign indicative man-hours, depending on factors such as:
Model complexity
Required LOD
Modeler experience
Quality of input files (DWG / IFC / Scan-to-BIM)
This method makes project planning, cost estimation, and offer preparation much more accurate and consistent.
A simplified example:
Project
├── Zone A
│ ├── Level 01
│ │ ├── Architecture Modeling
│ │ ├── Structure Modeling
│ │ ├── MEP Modeling
│ │ └── QA/QC & Clash Review
│ └── Level 02
│ ├── Architecture Modeling
│ └── ...
│
├── Zone B
│ ├── Level 01
│ ├── Level 02
│ └── ...
│
└── Coordination & Deliverables
├── Sheets & Documentation
├── Schedules
├── Clash Detection
└── BIM Execution Compliance
GHASEM ARIYANI
BIM/VDC Manager
Revit Architecture Certified Professional
Revit Structure Certified Professional
Revit Mechanical Certified Professional
Revit Electrical Certified Professional
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