An evaluation is designed to judge the worth of a program in regards to whether or not it should be continued, modified, or eliminated. Program evaluations can be performed either by those inside or outside of the organization, and can occur pre-implementation, during implementation, or at the end of a time period. There are many models or methods of evaluation, depending upon the objectives of the activity to be examined. Program evaluation can be most useful when multiple sources such as students, parents, counselors, supervisors, and administrators evaluate using multiple means, such as surveys, checklists, test results, observations, interviews, and so forth. There are many advantages to the multiple sources/multiple methods approach. It provides a broader perspective and credibility is enhanced. The disadvantages are that it takes more time, there can be an additional cost factor, and the interpretation of results may become difficult if data from different sources conflict. Six steps in designing a program evaluation are presented.