The document compares and contrasts two instructional design models: the ADDIE model and the Dick & Carey model. The ADDIE model is a linear 5-stage process developed in 1975, while the Dick & Carey model from 1978 is iterative with 10 stages and is more detailed. Both follow a systems approach and use evaluation, but the Dick & Carey model incorporates formative evaluation at multiple points while ADDIE only has summative evaluation at the end. The ADDIE model is simpler and faster but less flexible, while the Dick & Carey model allows for more revision and flexibility. In conclusion, both models are effective tools for instructional design despite their differences.