Custom business software, properly designed and programmed, will allow you to be more in control over your business. Control involves being able to Start, Change, and Stop activities and objects related to your business. Every business item goes through such a cycle of action (Start-Change-Stop). For example; an Order is started; it goes through some possible changes such as packing, invoicing, shipping, removing item quantity from inventory, adjusting a customer purchase order balance, and receiving payment.
Each thing being tracked in your Microsoft Access Database could have a start date, due date, and even status change dates. For example, you have a business rule that a response to a business quote should occur no later than x number of days after the quote was created. You need to be alerted if your client does not response by the expected time.
Tracking your business items properly means nothing will "fall between the cracks", because you will be notified when an expected end date or status change date is approaching.