The Quality Circle project is a problem-solving concept requiring the interaction of a variety of organizational skills. Circle members work together, becoming involved in problem-solving processes. They make decisions and take action based upon the data they collect. The reliablity of those data is crucial to the circle's success. Presented in this monograph are the elements of data collection and analysis with which circle members should be familiar. These are problem identification, formulation of data collection plans, sampling, instrument selection, graphic data display, data analysis, and presentation of results. Numerous illustrated examples are provided for each element discussed. Extensive explanation of norm tables is included as well as a bibliography and appendix. (MD)