Agile methods have been adopted by many information systems development
(ISD) teams and organizations in recent years. However, while agile
method research is growing, many studies lack a strong theoretical and
conceptual base. Innovation adoption theories provide new perspectives
on analysing agile methods. This paper is based on an exploratory study
of the application of innovation theory to agile practices in use,
focusing in particular on the later stages of assimilation i.e.
acceptance, routinization and infusion. Three case studies were
conducted involving agile method projects, using semi-structured
interviews. One key finding is that specific needs of the adopting
teams may drive the relevant agile practices in use to a deeper level of
assimilation. Another key finding indicates the period of agile use
does not have a proportional effect on their assimilation stages.
Therefore, one needs to be cautious when using time as a measure of
agile practice assimilation.