This paper reports a feasibility study to investigate the possible use of the programming language PML (Process Modelling Language) for task analysis. In so doing, it proposes a number of criteria for assessing task analyses. The study used PML to analyse and describe the task of producing a multi-author research proposal. To assess the suitability of PML for this purpose, a number of criteria were identified, concerning the effectiveness of: the task analysis product; the task analysis method notational support; and the task analysis method procedural support. The assessment of PML suggests that it may well be suitable for task analysis, generating a task analysis product particularly appropriate for software engineers developing multi-role systems, and offering a clear notation for a task analysis method. Its principal weakness is the lack of procedural support it provides as a task analysis method.