The main audience of a project notebook is yourself. Typically, only you will read your notebook entries and use them to recall ideas. However, you may also share notebook entries with your peers during group meetings. In industry, co-workers also benefit from one another's notebooks. For example, during a project meeting, group members need to justify a design decision. They can then refer to sketches and ideas in their notebooks as evidence to support their decisions. Also, when an employee leaves a company for another job, his/her successor will use the notebooks to continue project work and understand design decisions.