SDLC On Target

Sdlc

I found this great white paper by PM Solutions (2003) called “Selecting a Software Development Life Cycle (SDLC) Methodology.”

The paper describes and nicely diagrams out the various SDLC frameworks:

– Waterfall
– Incremental
– Iterative
– Spiral
– RAD
– Agile

It also provides a chart of the advantages and disadvantages of each framework.

Finally, there is a simple decision cube (D3) based on time horizon, budget, and functionality for selecting an SDLC framework.

This is a very useful and practical analysis for implementing SDLC, and it aligns closely with the guidance from the National Institute of Science and Technology (NIST) Special Publication (SP) 800-64, “Security Considerations in the Systems Development Life Cycle” Appendix E that states:

“The expected size and complexity of the system, the development schedule, and the anticipated length of a system’s life may affect the choice of which SDLC model to use.”

While NIST focuses on the time horizon and complexity versus the PM Solutions Decision Cube that uses time horizon, budget, and functionality, the notion of tailoringSDLC to the project is both consistent and valuable.

Just one more resource that I found particularly good is the Department of Labor IT Project Management guidance (2002)–it is a best practice from the Federal CIO website.

I like how it integrates SDLC, IT Project Management, IT Capital Planning and Investment Control (CPIC), and security and privacy into a cohesive guide

It also establishes project “thresholds” to differentiate larger or more significant projects with greater impact from others and calls these out for “more intensive review.”

Even though these these resources are around a decade old, to me they are classic (in a good sense) and remain relevant and useful to developing systems that are on target.

(Source Photo: Andy Blumenthal)

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