The transparency of your production at the decision-making level determines how you proceed.
The basis for this is provided by data from production. Manual capture may be one option that sometimes cannot be avoided.
However, automated data collection minimises possible sources of error. A wide variety of methods are used to collect data. Signals can be captured right down to the field level. The large volume of data generated is then pre-processed and stored in the suitable database systems for further processing and evaluation.