An Analysis of Some Commercial PL/1 Programs

IfSQ

Research into the Maintenance of Software

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Journal Paper: Cover of IEEE Transactions on Software Engineering

An Analysis of Some Commercial PL/1 Programs

James L. Elshoff
Recorded 1976 in IEEE Transactions on Software Engineering , SE-2, no. 2, June
Pages 113-20
Abstract:
The source code for 120 production PL/I programs from several General Motors' commercial computing installations has been collected. The programs have been scanned both manually and automatically. Some data from the scanning process are presented and interpreted.
Link:
An Analysis of Some Commercial PL/1 Programs

Finding relevant to IfSQ Standards:

50% to 80% of plain "if" statements should have had an "else" clause

IfSQ Defect Indicators:

DP-3—Unexpected State Not Trapped
Part of a program that uses a value to switch between different branches does not trap unexpected cases.