The Sims Image-Based Organizational Model (SIBOM) with reference to its use in evaluation of bilingual education programs is described. The technique elicits participant perceptions in metaphor-generating sessions. This is one step in a process whereby participants' perceptions can be organized to describe the system of problems and resources they perceive in their environment, as well as areas of agreement and disagreement, and sometimes how the participants' own process strengthens or weakens achievement of their objectives. SIBOM's use of metaphor in the evaluation process takes advantage of the metaphor's projective properties, its synthesizing function, and its generality or remoteness from specific problems. The two levels of analysis, content and process, are described. The content analysis determines the degree of congruence in perceptions of the respondents regarding matters such as age, time in program, sex, ethnic background. Process analysis is done through observation of behavior and interaction in the metaphor-generating group. By way of conclusion, a brief account is provided of the rise and decline of the SIBOM evaluation model. (AMH)