this is the study: "If the cost of fixing a requirements error discovered during the requirements phase is defined to be 1 unit, the cost to fix that error if

this is the study: "If the cost of fixing a requirements error discovered during the requirements phase is defined to be 1 unit, the cost to fix that error if found during the design phase increases to 3 - 8 units; at the manufacturing/build phase, the cost to fix the error is 7 - 16 units; at the integration and test phase, the cost to fix the error becomes 21 - 78 units; and at the operations phase, the cost to fix the requirements error ranged from 29 units to more than 1500 units" [0] [0] https://ntrs.nasa.gov/citations/20100036670 https://ntrs.nasa.gov/citations/20100036670