Inadequate logging or recording of work has been cited as contributing to several incidents. Even if engineers think they will complete a job, it is always necessary to keep the work record up-to-date in case the job has to be handed over to someone else. This may not necessarily be a result of a shift change, but might be due to a rest break, illness, the need to move to another task, etc. If work is left incomplete, are there proper notices, flags, warning placards and documentation indicating the state of the aircraft? If there is a shift change-over diary, has it been filled out properly? Make sure no one h as to make assumptions.