Disassembly process is an essential activity in the mid and end of a product's service life cycle. Maintenance is a mid product life activity, which involves disassembly, cleaning, repair, replace, inspection, and reassembly. Remanufacture, reuse, and recycle are activities at the end of a product's service life. The main purpose of performing these activities is to increase sustainability, which includes reduce environmental impact, increase economic, and extend societal benefits to meet the goal of sustainable development. This report describes a developed disassembly information model. It is an integrated information model with the following key components: feature, tolerance, workpiece, material content, equipment, and process. The model supports the modeling of disassembly features, sequence, operations, decision making, and workflow. Case study using real products and their specific disassembly processes is provided to verify the developed model.