There are many reasons for work not being completed. Works are usually stopped when their creator dies, although some, aware of their failing health, make sure that they set up the project for completion. If the work involves other people, such as a cast of actors or the subject of a portrait, it may be halted because of their unavailability. Projects that are too grandiose might never have been finished, while others should be feasible but their creator's continual unhappiness with them leads to abandonment.