Everyone experiences in construction and takes it for granted that he will find careful records being maintained on each individual equipment with respect to identification, number of hours worked, regular attention to maintenance and servicing, nature of repairs and their costs, speeds of operation, production of the equipment, etc. All these records are analysed to discover ways and means for improving reliability 'and increasing the performance characteristics of the equipment.
These are exactly the same operations and observations which should be maintained on every construction job. Quite often superintendents keep a detailed record of small amounts whereas practically no operating records are maintained for expensive equipment. Too frequently the attitude is taken that so long as the shovel is excavating everything is alright, whereas a careful study of operating performance may show that the shovel was performing at a daily use efficiency of only 50-60%. There is no substitute for accurately maintained records of equipment performance, and they will pay for themselves many times over if they are carefully studied and judiciously used.
A number of factors determine the performance of construction equipment. These factors are related to the type of equipment and the job conditions. Job conditions may be classified as excellent, good, fair and poor. There is no uniform standard which may be used as a guide in classifying a job. Each job planner must use his own judgement and experience in deciding which condition best represents his job. Performance characteristics of some of the equipment will be discussed in the subsequent sections.
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