Coping with ‘requirements-uncertainty’: the theories-of-action of experienced IS/software project managers

The notion of ‘requirements-uncertainty’ has received a lot of attention in the Information Systems (IS) and Software Engineering literature. As the level of uncertainty of user-requirements increases, this literature advises project managers to move away from the traditional waterfall life-cycle model and towards more ‘experimental’ approaches, such as incremental-delivery and prototyping. But there is evidence from empirical research to show...