Table C20 Defect Type Standard                 11/24/1995

10 Documentation           comments, messages, manuals
20 Syntax                  general syntax problems
 21   Typos                spelling, punctuation
 22   Instruction formats  general format problem
 23   Begin-end            did not properly delimit operation
30 Packaging               change management, version control, system
                           build, library
40 Assignment              general assignment problem
 41   Naming               declaration, duplicates
 42   Scope
 43   Initialize and close variables, objects, and so on
 44   Range                variable limits, array range
50 Interface               general interface problems
 51   Internal             procedure calls and references
 52   I/O                  file, display, printer, communication
 53   User                 formats, content
60 Checking                error messages, inadequate checks
70 Data                    structure, content
80 Function                general logic
 81   Pointers             pointers, strings
 82   Loops                off-by-one, incrementing (Schleifenvariable
                           nicht incrementiert), recursion
 83   Application          computation, algorithmic
90 System                  timing, memory, and so on
100   Environment          design, compile, test, other support system
                           problems

Bibliography

Chillarege, Ram et. al. "Orthogonal Defect Classification -
A Concept for In-Process Measurements",
IEEE Transactions on Software Engineering vol. 18,
no. 11 (Noember 1992): pp 943-956