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The following 11 steps were developed based upon the methodologies and ideas of Kieras and Olson-Olson and describe the proper approach to calculate the time it takes to complete a task by using a computer interface and hardware.
*Step 1--Obtain a working prototype of computer interface or a step by step operational description of a task.
*Step 2--Identify the goals or the desired outcome of work .
*Step 3--For each of these goals, find subgoals or tasks that achieve the main goals.
*Step 4--Identify methods to main goals and all subgoals.
*Step 5--Convert description of methods to pseudo-code (the terminology that is described above).
*Step 6--State any and all assumptions used in the making of pseudo-code and goals.
*Step 7--Determine appropriate mental or keystroke operators for each step.
*Step 8--Assign time values to mental or keystroke operators.
*Step 9--Add up execution times for operators.
*Step 10-Adjust total time of task to be sensitive by age of expected.
'''Age''' '''Time Adjustment Multiplier (Multiply task time by this value)'''
18-30 Use as is
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> 65 By 2.2
*Step 11-Verify validity of results
==Problems with this model==
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