SOP: Quality Control System (No Rework System)
Purpose:
Build every work right the first time to eliminate rework, save cost, protect schedule, and increase client trust.
1. Core Principle
“Do it right the first time.”
Rework =
❌ Time loss
❌ Cost increase
❌ Team stress
❌ Client distrust
2. Quality Control Flow (Zero Rework)
Plan → Check → Approve → Execute → Inspect → Accept
Never skip steps.
3. Pre-Work Control (Before Start)
A. Drawing & Specification Review
Check all drawings (Architectural, Structural, MEP)
Confirm dimensions, levels, materials
Identify conflicts (beam vs pipe, wall vs door, etc.)
👉 If unclear → STOP and ask before working
B. Method Statement (Work Plan)
Define clearly:
How to do the work
Tools & equipment
Materials required
Safety method
Quality standard
No method = No work
C. Material Control
Check material type, size, quality
Verify supplier and approval
Reject damaged or wrong materials
Right material = 50% quality success
D. Mockup / Sample Approval
Before full work:
Build a sample (tile, paint, finishing, etc.)
Get approval from client/engineer
Approved sample = standard for all work
4. During Work Control
A. Site Supervision
Supervisor must check:
Alignment
Level
Dimension
Installation method
👉 Do not wait until finished
B. Checklist System
Each work must have a checklist.
Example (Concrete Work):
Formwork alignment ✔
Rebar spacing ✔
Cover thickness ✔
Clean before pouring ✔
No checklist = high risk of mistake
C. First-Time Inspection Rule
After first small section:
👉 Stop → Inspect → Approve → Continue
Do not continue full work without confirming first part is correct.
D. Communication Control
Clear instruction to workers
Use drawings, sketches, photos
Confirm understanding
Wrong communication = wrong work
5. Post-Work Inspection
A. Internal Inspection
Contractor team checks:
Finish quality
Level, alignment
Defects (crack, gap, uneven)
B. Engineer / Client Inspection
Submit work for approval
Fix minor issues immediately
C. Punch List System
List all small defects:
Mark location
Assign responsible person
Set deadline
6. No Rework Rules
Do not start without approved drawing
Do not start without material check
Do not skip checklist
Do not rush without inspection
Do not continue if first part is wrong
7. Common Mistakes to Avoid
Working without reading drawings
Guessing dimensions
Using wrong materials
Poor communication
No supervision
No checklist
Rushing to finish
8. Quality Control Roles
Project Manager
Ensure system is followed
Approve method & materials
Site Engineer
Control technical work
Check drawings & execution
Supervisor
Monitor daily work
Check quality on site
Workers
Follow instruction
Report problems
9. Daily Quality Routine
Morning:
Review today’s work
Check drawings
Brief team
During work:
Inspect continuously
Correct immediately
End of day:
Check completed work
List defects
Plan fix tomorrow
10. Quality KPI (Measurement)
Track these:
Number of defects
Rework cost
Inspection pass rate
Client complaints
Goal:
Reduce defects to near zero
11. Simple Rule for Team
“Check before, check during, check after.”
12. Final Principle
Quality is not done at the end.
Quality is controlled at every step.
No control = rework
Good control = profit + reputation + growth