You can use TODO keywords to indicate different, possibly sequential states in the process of working on an item, for example36:
(setq org-todo-keywords '((sequence "TODO" "FEEDBACK" "VERIFY" "|" "DONE" "DELEGATED")))
The vertical bar separates the TODO keywords (states that need action) from the DONE states (which need no further action). If you do not provide the separator bar, the last state is used as the DONE state.
With this setup, the command C-c C-t cycles an entry from ‘TODO’ to ‘FEEDBACK’, then to ‘VERIFY’, and finally to ‘DONE’ and ‘DELEGATED’. You may also use a numeric prefix argument to quickly select a specific state. For example C-3 C-c C-t changes the state immediately to ‘VERIFY’. Or you can use S-RIGHT and S-LEFT to go forward and backward through the states. If you define many keywords, you can use in-buffer completion (see Completion) or a special one-key selection scheme (see Fast access to TODO states) to insert these words into the buffer. Changing a TODO state can be logged with a timestamp, see Tracking TODO state changes, for more information.
Changing the variable
org-todo-keywords only becomes
effective after restarting Org mode in a buffer.