1. Some statistics from the DPMA Software Management Conference earlier this year:. 75% of the software development undertaken was never completed or not used if completed. . Of the 75% 25% was never delivered and 47% was delivered but not used. Some statistics from the DPMA Software Management Conference earlier this year:. 75% of the software development undertaken was never completed or not used if completed. . Of the 75% 25% was never delivered and 47% was delivered but not used.
2. System Attribute Specification Tom Gilb Software Engineering Notes July 1981 p. 78. 10.1145/1010832.1010862 System Attribute Specification Tom Gilb Software Engineering Notes July 1981 p. 78. 10.1145/1010832.1010862
3. Sam Harbaugh in Open Channel Computer February 1982 p. 97. Sam Harbaugh in Open Channel Computer February 1982 p. 97.