Project managers use contracts to buy products or services needed for their projects. Every contract usually defines how the seller gets paid in one of three ways.
1. Fixed Price (Lump Sum)
- What it means: One total price is agreed upfront
- Best for: Clearly defined work
- Payment: Stays the same no matter the seller’s actual costs
Seller profit is already built into the price
2. Cost Reimbursable
- What it means: Buyer pays for actual costs + a fee (profit)
- Best for: Work that isn’t fully defined
Types:
- CPIF: Costs + performance-based bonus
- CPFF: Costs + fixed fee
- CPPC: Costs + % of total cost
More risk for the buyer (costs can increase)
3. Unit Price (Time & Materials)
- What it means: Pay per unit (e.g., hourly rate)
- Best for: Work with unclear scope but measurable effort
- Labor = hourly/daily rate (includes profit)
- Materials = per-unit cost (includes profit)
- Travel = usually reimbursed separately
Quick Summary (Easy to Remember)
- Fixed Price: “Set total price” → low risk for buyer
- Cost Reimbursable: “Pay actual costs + fee” → higher risk for buyer
- Unit Price (T&M): “Pay per unit/hour” → flexible, medium risk
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