Fabian,
Another limitation we have is that our data is not longitudinal across individual students' studies but rather longitudinal across the development projects and the development of the factory itself. Our project cycles are approximately seven weeks long and students come and go over those seven weeks.
If you have timing at fine granularity you might like to compare activity duration with the pattern seem in this commercial data set: http://shape-of-code.coding-guidelines.com/2012/09/03/descriptive-statistics-of-some-agile-feature-characteristics/ Is your data made available for download? -- Derek M. Jones tel: +44 (0) 1252 520 667 Knowledge Software Ltd blog:shape-of-code.coding-guidelines.com Software analysis http://www.knosof.co.uk -- The Open University is incorporated by Royal Charter (RC 000391), an exempt charity in England & Wales and a charity registered in Scotland (SC 038302).
