Whereas items such as pressure, temperature, tank levels, and so on can be measured accurately relatively simply, the task becomes much more complicated when we are dealing with bearing clearances and other parameters that are affected by wear, for example.
Njengokuba izinto ezifana noxinzelelo, iqondo lobushushu, imilinganiselo yetanki, nezinye ezingalinganiswa ngocoselelo nangokulula, umsebenzi, ubanzima ngakumbi xa sisebenza izicoci zokunxulumana nobunye ubuninzi obungatshintshiyo kwimeko ethile kodwa bungafani kwezinye iimeko ezibandakanya okanye ezenzisayo ngesinxibo, umzekelo.