Representative construction bid margin scenario

المشكلة

A subcontractor prices labor and materials on the base bid but under-reserves for mobilization, inspection cycles, and schedule slip — margin looks intact on paper until field burn catches up.

مجموعة المدخلات

• Base contract $620,000, bid margin target 18%
• Crew 8, field burn $2,850/day, 12-day slip risk on critical path
• Allowance $18,000 for rework / re-inspection

الخسارة الخفية

Delay burn and re-mobilization are excluded from the headline bid — modeled hidden exposure ~$34,000–$42,000 on this illustrative schedule input.

Schedule & mobilization margin leak

نتيجة الحساب

Headline bid implies ~17.5% margin; loaded field burn and slip reserve pull modeled net margin toward ~11–13% vs the 18% target (representative simulation).

Contract value minus loaded direct cost, schedule-disruption reserve, and remobilization buffer; net margin compared to target band.

الإجراء المقترح

Increase bid reserve or tighten schedule assumptions before tender submission if modeled net margin falls below target.

الأثر المقدر: Modeled margin compression band on this synthetic bid — not verified project savings.

ملاحظة المنهجية

Deterministic construction overrun model with user-entered burn and slip days — illustrative framing for bid review, not a guarantee of field outcome.

• Burn rate flat across slip days
• Rework allowance entered explicitly
• Representative scenario — modeled exposure, not a verified customer outcome.

الأداة ذات الصلة

Change Order Impact Analyzer