Warehouse optimization planning

I work in a logistics company, one of us the company the area logistics company, but recently always been complaints from customers, that is our warehouse management is bad, the morning items are missing, or the wrong and so on, for now is the boss for this thing to say is that we have a headache. Are trying to help, a week later, no one has a better proposal, but by Monday, leading happy said now have idea, because after the Warehouse optimization planning, we are facing our problem is solved, everyone still first heard of the Warehouse optimization planning, so are very curious, but after that is will give us one at a time, you will feel secure.