Your first project will give you an opportunity to do modeling of user tasks. You will need to identify 3 functions in the same program (e.g. Winzip or Acrobat Reader). For each function, you will need to identify one situation in which the function works well and one situation in which the function works poorly.

For each of the functions, build Keystroke Level Models for one situation in which each function works well and one situation in which the each function works poorly. Estimate the execution time (including mental operators) for each model. Determine the actual execution times required for 3 users to complete each of the 6 situations.

Write a GOMS model for each of the 3 functions. The GOMS model should cover both situations modeled for each function. You should then calculate the estimated times to execute each function. Compare the estimated execution times for the GOMS models and the keystroke models.

The write-up for this project is due 2 weeks from Tuesday. Your write-up for this project should include: the models, your assumptions, the task scenario descriptions, calculations, relevant data displays, statistics, and your conclusions.

Assigned: 5/12/05
Date due: 6/1/05