There is much we don't know about information system development and the use of systems development methodologies. Research to date has focused on the development of new methodologies. There has been little evaluation of these methodologies or examination of the selection, development, adaptation, or use of methodologies in practice. This paper discusses this lack of knowledge, its ramifications, and key research questions.
Wynekoop, Judy L. and Russo, Nancy L., "SYSTEM DEVELOPMENT METHODOLOGIES: UNANSWERED QUESTIONS AND THE RESEARCH-PRACTICE GAP" (1993). ICIS 1993 Proceedings. 15.