<prompt> Translate the following text to EnglishWakati wa kuwasili na kuondoka kwa wafanyakazi kwa kipindi cha malipo huanzishwa, ratiba hizi huwa msingi wa kumbukumbu ya data ya TA isipokuwa kutofautiana au kupotoka muhimu hutokea.  <response>: When employees arrival and departure times for a pay period are established, these schedules become the basis for recorded TA data unless material variances or deviations occur. 