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Chapter 11: Plan to Throw One Away

Chapter 11: Plan to Throw One Away. By Nate Loontjer 03/05/2002. Automotive, Chemical, etc. use pilot plants to test design concepts. Pilot plants are used to find and correct problems before the final plant or product is implemented.

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Chapter 11: Plan to Throw One Away

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  1. Chapter 11:Plan to Throw One Away By Nate Loontjer 03/05/2002

  2. Automotive, Chemical, etc. use pilot plants to test design concepts. Pilot plants are used to find and correct problems before the final plant or product is implemented. Systems programmers expect the first product to be correct and useable. The first product is delivered to customers and subsequent bugs/features are worked out later. Programmers Have Not Learned From Other Industries

  3. Plan to throw one away; you will, anyhow.

  4. How to Prepare a System For Change • Modularization • Subroutines • Complete definition of interfaces • Complete Documentation

  5. Two Steps Forward, One Back • Program maintenance begins after delivery. • Old bugs are fixed, new features are introduced. • New features introduce new bugs.

  6. One Step Forward, One Back At some point, bugs from new and old features become so entwined with the system that it is impossible to root them out, and a new system will need to be developed from scratch. The new system should take advantage of new hardware, configurations, and user requirements.

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