The Waterfall Model was a straw man argument from the beginning (2015)
Debate over the “waterfall” software development model centers on whether it was ever truly practiced as rigidly as agile advocates claim, or whether that portrayal is a straw man. Commenters recount real-world waterfall-like projects, especially in government, defense, hardware, and large corporations, noting both successful outcomes and high-profile failures, and contrasting them with the messiness of modern agile processes. A recurring theme is that no single methodology fits all contexts: constraints such as regulation, deployment costs, safety, and organizational culture often dictate a hybrid or iterative approach, and outcomes depend more on competent people and clear requirements than on labels like “waterfall” or “agile.”
Reality of Waterfall vs Strawman
- Many recall explicit waterfall processes in the 80s–2000s: formal SDLCs, contracts, audits, big-4 consulting “methods,” government and defense standards.
- Others say they never saw “pure” waterfall; what existed was heavily waterfall-ish but with backtracking and quiet iteration.
- Several argue the “pure, no-feedback waterfall” used in Agile sales is itself a caricature, yet the mentality it represents was very real.
Origins and Intent of the Waterfall Model
- The original 1970 paper didn’t use the term “waterfall” and presented the simple diagram as a starting point, then immediately critiqued it.
- The author recommended doing the process twice and adding feedback loops, anticipating spiral/iterative development.
- Later interpretations and standards codified a stricter, more brittle version than the original intent.
Why Waterfall Took Hold
- Borrowed from physical engineering and Taylorist management: big upfront design, strict phase gates, heavy documentation.
- Made sense when compute was expensive, releases were rare, and changes after deployment were extremely costly.
- Government contracts, safety-critical domains, and legal/compliance contexts favored fixed specs and gated processes.
How Waterfall Looked in Practice
- Long requirements phases, rooms of binders, Gantt charts, formal “gates” between requirements, design, implementation, test, acceptance.
- Often “pragmatic waterfall”: feedback existed but was seen as exception or failure of planning, not a core mechanism.
- Many organizations quietly combined official waterfall with informal prototyping and iterative work.
Where Waterfall (or Near It) Works
- Reported as effective for:
- High-assurance systems (space, aviation, medical devices, defense, core banking, telecom platforms).
- Rewrites where requirements are already well-understood.
- Small, well-bounded internal projects with a clear “done” state.
Critiques and Failures of Waterfall
- Common failure pattern: massive upfront specs, late integration, system doesn’t match real needs, expensive rework or abandonment.
- Seen as encouraging the fantasy of complete upfront knowledge and making course corrections politically difficult.
- Some argue strict waterfall virtually guarantees mediocrity or failure on large, evolving systems.
Agile, “Agilefall,” and Process Cargo-Cults
- Many say “Agile” as practiced often degenerates into mini-waterfalls with heavy ceremony (“wagile,” “Agilefall”).
- Debate centers on matching process to domain: frequent feedback and cheap deployment favor agile; expensive changes favor more upfront design.
- Broad agreement: no single methodology fits all; success depends more on competent people, honest feedback, and sane risk management than on labels.