Strain deals with the effects on humans. It is closely related to the degree of mechanization.
Now we are here.
Due to the standard working method, the stress is typical for a certain job. But each working person has individual attributes and can react in a different way. And this reaction can vary from day to day and during the daytime as well. This causes different strains that must be answered by different strategies.
Too complex? We learn at the end about the correlation of the standard method and the likelyhood of strain.

Fig. E04-01: The actual position in the three step model of technodiversity; making an assessment under social point of view