Contract Pricing Types
Awareness of pricing types & associated risks is key commercial succes factor 

Selection of contract pricing type depends primarily on the level of scope & quantity definition of the technical package and preferred commercial risk allocation as well as desired level of certainty. So for a fully defined FEED package a Lump Sum fixed price could be applied. 

For construction packages the use of unit prices or unit rates is a fairly common approach whereby certain parts such as mobilisation can be lump sum priced.

Many EPCm services type contracts are normally priced on a cost reimbursable basis (time rate & cost plus) combined with a form of performance incentives based on KPIs.