Boehm - Requirements Volatility

Communications of the ACM, October 2006

Barry Boehm One-size-fits-all Methods: the Wrong Solution to new Problems

Requirements Volatility ratings for stable embedded devices are still in the 0.1% to 0.3% per-month range, but the counterpart ratings for rapidly changing competition-driven applications are often in the 10% to 30% per-month range.