(i) Predictive:- Maintenance procedure based on record keeping and reading of testings. The intelligent use of records can often lead to detection of faults before a dangerous situation arises having a pre-knowledge of past break down.
(ii) Corrective: Maintenance carried out as a result of major or sudden breakdown of machines. This maintenance process is always expensive and disrupts production.
(iii) Preventive: This involves the maintenance engineer having knowledge of the state of each item and circuit such as circuit breakers, switches and fuse boxes. It also embraces servicing of plants such as rotating plants bearing machine noises, mechanical defects and insulation overheating. Maintenance carried out regularly to prevent breakdowns and enhance productivity.
