The Contract Problem in Agile

The software requirements document is usually part of the development contract, but incremental specification is inherent in agile methods — making it difficult to write a contract based on a fixed set of requirements

Explanation

The software requirements document is usually part of the contract between customer and supplier. Because incremental specification is inherent in agile methods, writing contracts for this type of development may be difficult. Consequently, agile methods must rely on contracts where the customer pays for the time required for development rather than the development of a specific set of requirements.