Why is it important to spend time and thought when designing data collection tools for a project?
The short answer is that your project results will only be as good as the tools used in data collection. Implicit in that answer is that there is a point of diminishing returns where increased quality of tools may not translate to increased quality of data. These are some of the decisions one must make in project design. The concept is encapsulated by the phrase, "The enemy of good is better." A lot of time an effort can be expended making something better when good was sufficient for ...
One must remember that the quality of equipment for a project needs to be sufficiently high to meet the demands, but not over-designed. Time spent on advanced planning of a project helps avoid cost, personnel, and time inadequacies for the project demands.