Task Analysis > Card, Morn, and Newell GOMS (CMN-GOMS)

De Vinci Man image Card, Morn, and Newell GOMS (CMN-GOMS)
Description : CMN-GOMS is the original GOMS model proposed by Card, Moran and Newell (1983). CMN-GOMS builds on KLM-GOMS by adding subgoals and selection rules. A CMN-GOMS model can predict operator sequence as well as execution time. A CMN-GOMS model can be represented in program form, making it amenable to analysis as well as execution. This technique requires a strict goal-method-operation-selection rules structure. The structure is rigid enough that the evaluator represents the tasks in a pseudo-code format (no formal syntax is dictated). It also provides a guide for how to formulate selection goals.
Advantages : 1) CMN-GOMS can also be used to estimate the memory load the task places on the user. 2) It is more flexible than KLM-GOMS because the pseudo-code is in a general form.  That is, it can be executed for different scenarios.  KLM’s procedure is a simple list that has to be recreated for each slightly different task.
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Tool Type : Software
References : 1) John, B. E. & Kieras, D. E. The GOMS Family of Analysis Techniques: Tools for Design and Evaluation. Download 2) John, B. E. & Kieras, D. E. Using GOMS for User Interface Design and Evaluation: Which Technique? Download 3) http://www.eecs.umich.edu/~kieras/goms.html
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