The goal is to put drills or exercises into a context to optimize their effectiveness by choosing the correct drill to use at the correct time and place in the overall training program. To do this consider using the following evaluative criteria:
Why are you doing the drill? Is it just a time filler or does it serve a specific purpose.
What particular athletic component does the drill enhance? Sometimes there is a tendency to try to have a drill will try to do too much. Be very specific in designing the drill to address specific components or athletic qualities.
What is the actual drill? You should be able to describe it in detail in terms that everyone that you work with can understand.
Do you need specialized equipment to do the drill? If so, how specialized? Do you have time within the context of the workout to use this specialized equipment? I know personally that there are many things that I can do using equipment or apparatus that I can do with an individual or a small group that will not work in the context of team training.
How is the drill performed? Correct execution is essential in order to elicit the optimum training adaptation.
What are the ranges of sets and reps? This should be congruent with the purpose of the drill. Quality is more important than quantity.
It is doing what you wanted it to do? Mastery is the goal, so correct execution must be stressed. Mastery entails correct execution of the drill within the context of individual variability and sport demands.
When and where in the program does the drill fit? This is essentially the periodization aspect of the whole process. The timing and sequence of the application of the drill can often be more important that the actual drill.
What level of development is the drill best suited for? Certain drills , by their nature are better suited for the developmental than a more advanced athlete.