Jul 27, 2026 Cleanroom Delivers 0.1 Defects per KLOC. You Don't Need the Full Religion to Get There. Cleanroom software engineering cuts defect rates by 100×, but full adoption requires separate test teams and formal proofs. cleanroom-correctnessprocessefficiencypragmatism
Jul 26, 2026 IBM's Zero-Defect Process Delivered 0.1 Bugs Per KLOC. The Industry Abandoned It Anyway. IBM's Cleanroom engineering achieved defect rates 100× better than industry average, then faded into obscurity. cleanroom-correctnesszero-defectssoftware-historyprocess
Jul 12, 2026 Fagan Inspections Found 90% of Defects Before Testing. Then We Stopped Doing Them. Michael Fagan's structured inspection process at IBM caught nearly all defects before they reached a compiler. fagan-inspectionscode-reviewsoftware-historyprocess
