The two most critical
components of measuring are 1) accuracy and 2) reliability.
Both accuracy and reliability are to some degree a function of the quality of the equipment used for the measurements. Measurers are frequently expected to perform accurate and reliable measures on equipment which is not designed for performing accurate measurements. On the other hand, if appropriate equipment is available, it is often not properly maintained or is improperly used.
equipment is deemed to be expensive and is not purchased, or inferior
or improvised equipment is used in the clinic. Quality, easily calibrated
and well maintained equipment is a good investment and will provide years
of accurate and reliable service. Because quality equipment is durable,
the seemingly high initial investment costs for quality equipment can
be amortized over 20 or more years of service.