This document discusses program evaluation models, including the CIPP (Context, Input, Process, Product) model developed by Stufflebeam et al. in the 1960s. The CIPP model guides evaluators in assessing a program's context, inputs, processes, and products. Context evaluation assesses needs and priorities. Input evaluation judges resources and strategies. Process evaluation monitors implementation. Product evaluation determines outcomes and whether goals were achieved. The CIPP model provides a systematic framework for evaluation to make judgments about a program's merit and effectiveness.