Information Technology Reference
In-Depth Information
• Source code for 1,000 function points: 320,000 logical code statements
• Programming language: Basic assembly language
• Reuse percentage: 0% to 1%
• Methodology: Mathematicians or engineers, ad hoc programming
• Productivity: 2.5 function points per staff month
• Defect potentials: 7.50 per function points
• Defect removal efficiency (DRE): 75%
• Delivered defects: 1.875 defects per function point
• Ratio of development personnel to maintenance:
•
Development: 97%
•
Maintenance: 3%
The following are the background data for 1945:
• Average language level: 1
• Number of programming languages: 2
• Logical statements per function point: 320
• Average application size: 1 function point
• Average application size: 320 logical code statements
This decade was characterized by custom hardware and limited memory size.
Large programs were impossible because computer memory could not store them.
By the end of the decade, digital computers began to show value but were much
too large and expensive for general use. Only military organizations and some uni-
versities could afford digital computers. The next decade would see major changes
in hardware and major expansion of software.
Programming was also poised to expand, with the development of subroutines
and reusable code laying the foundation for future high-level programming lan-
guages.
Summary
At the start of the 1940s, World War II rapidly engulfed the world in one of the
most devastating conflicts in history. The war led to a massive increase in the need
for rapid calculations for military ballistics, cryptanalysis, and other military ne-
cessities.
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