To develop an ecological task analysis, systematically scale environmental and task constraints to accomodate individual constraints in a developmentally appropriate manner. To summarize the process is as follows:

Pick out a skill or task to reach. Determine the individual constraints that are most important for the skill. Pick several environmental or task constraints for the particular task that can be manipulated in relation to each individual constraint. For each environmental or task constraint, determine a practical range, from easy to hard, for the learner. When scaling, keep in mind that samll changes in a constraint can lead to large changes in performance.