A digital service can reduce displacement, errors, and the use of materials. However, it introduces equipment, infrastructure and maintenance activities. Its overall effect depends on the real change it produces in the process.
Consider a hypothetical example: a stock management system reduces unnecessary purchases and products requiring disposal. To evaluate the result, one must observe what changes from the previous situation, including startup costs, necessary devices, and work dedicated to the system. The expected savings do not automatically coincide with the one obtained.
The scale counts, too. An improvement per operation can coexist with an increase in overall operations. For this reason it is better to measure both unit indicators, such as the material used per order, and total values, such as the material used over the entire period.
An operational proposal is to choose few results: avoided errors, unused stocks, necessary transfers and equipment life. These data can guide management, but do not replace a comprehensive environmental assessment when making claims about net benefit.
Technology choice should include upgradability, assistance, and the ability to continue using data. A system that is difficult to maintain may require premature replacements or new manual work. Measuring together the efficiency and resources used helps to understand whether digitization is solving the problem for which it was introduced and what effects require a correction.