In today's high-tension workplace, a great deal of focus is placed on employee accountability in order to maintain or increase the bottom line, according to Robert Kreitner, author of "Management." Log books are a time-honored way to determine which employers were where, and when.


Staff log books, including log-out books, are instruments used to determine the exact date and time an employee stopped working for that day. They come in a variety of formats, including old-fashioned ledgers, punch-out clocks or even computerized sign-in sheets with employee passwords.


Whether or not to use a staff log-out book is up to the employer's discretion, and many of them elect to do so for different reasons. Supervisors may believe that employees are more apt to stay for their entire shift if they must provide a written record of having done so.


Staff log-out books have a variety of uses. Firstly, they can determine if employees are dependable, and consistently starting and ending their shifts on time. Secondly, they can be used to settle workplace and legal disputes, which may call into question which employee was performing a job at a particular time.