Most tasks we do at work are either process or project-based. Processes are made of repetitive tasks that we do repeatedly, with little to no variation. Project work can vary significantly from one project to another and can change based on internal or customer requirements.
For example, to keep a home functional and comfortable, we perform repetitive tasks like cleaning, occasional painting, and sometimes projects, such as major renovations. We usually don't track the costs of cleaning, but we're cautious with improvements, which are often more expensive and difficult to manage.