Abstract
In this paper, we define a fundamental model of e-assessment in e-learning based on the analysis of the needs of learners and tutors. Therefore, we describe an innovative approach to specify an adapted workflow for flexible e-assessment system. This approach is based on refinements techniques which are specified by UML activity diagram language. Firstly, we propose an e-assessment generic workflow composition based on workflow refinement. Secondly, we provide from a composed generic workflow a flexible e-assessment workflow. We define a flexible e-assessment workflow as an e-assessment workflow tailored to each learner profile. This flexibility is defined by an adaptation workflow refinement. Based on adaptation workflow functions, we define a set of adaptation rules to specify a flexible e-assessment workflow.