This is inefficient in several ways. When a worker uses a paper-based system he has to take in the orders, print them, prioritise operations, read them line by line, locate each order in the warehouse - more unnecessary time spent searching and walking around - and picking the correct amounts.

When the order is complete, the worker has to note down deviations and stock ruptures, subtract the units picked from each location and then enter all this new information in the computer.

It is very easy for errors to occur during this process, and detecting them before the order is sent to the client is a costly process. And investment in designing a quality control system to detect inefficiencies, apart from being expensive, does not even enable all the errors to be dealt with.

As a result, client complaints arise, causing a negative impact on the quality of the service. And this leads to higher costs as new corrections have to be made and the unsatisfied clients can even be lost.