The requirements capture process is a difficult but vital part of the project. The 'requirements' to be captured are safety, application and system requirements.
Existing requirements are recovered using techniques incorporating formal and computer-aided techniques to capture requirements from existing design documentation. e.g. the analysis of ladder logic diagrams for discrete relay-based systems that may need to be replaced by computer based equivalents.
Further requirements are established through using the following methods:
An information collection exercise has been carried out using the following sources:
The framework for Work Package 2 has been identified, with three main components:
|A requirements engineering lifecycle||First developed in the context of a safety lifecycle and Plant Modification Proposal (PMP).|
|A set of stakeholders or viewpoints||i.e. anyone whose work will be affected by the project.|
|A taxonomy of projects||Based on criticality, timeliness, size of code, cost, etc.|