Abstract Disassembly is essential to dismantle a product for remanufacturing during maintenance or at the end of service life. The National Institute of Standards and Technology has developed an information model for describing disassembly processes. A disassembly process includes many subprocesses, such as separation, cleaning, repair, replacement, and inspection. This paper describes a disassembly process information model with the following key components: workpiece, material content, equipment, and workflow. The workflow aspect supports the modeling of operations, operation sequences, decision making, branching an operation into multiple ones, and joining multiple operations into one. The model provides a foundation for computer-aided disassembly software systems development.