Preventive Action – action taken to eliminate, or reduce, the risk of a cause that if left untreated, may contribute to a nonconformance.
Cause and Effect Diagram – Man (Woman), Material, Machine (equipment), & Method
What is done in any (all) of these areas to prevent a negative effect?
Possible causes for nonconformance
Man – lack of training, insufficient education, poor physical & mental well-being, unmotivated or demotivated with the job
Material – Wrong material selection for application (design), environmental/thermal degradation, material obsolescence, damaged in handling or processing, not readily available
Machine – wrong machine (fixture/equipment) for the job, machine wear & tear, poor/long setups, cumbersome, at max capacity and can’t meet demand
Method – wrong method applied, no standardized method exists, wrong theory, too complex, not enough planning, physically difficult
FMEAs and Preventive Maintenance are classic examples of these as noted earlier. FMEAs are excellent in addressing all the traditional M’s.
Possible Preventive actions
Man – programs for physical and mental health. Eye programs for associates so those that need glasses to do their work get them! Environmental controls for comfortable working conditions, ergonomically design workstations, educational assistance and job training.
Material – Drawing specifications and design requirements with respect to material selection (how is the product used and what is the environment it subject to?). For example, virgin material versus regrind, plating and finishing, color.
Machine – proximity switches, photo or fluidic sensors and switches, safety guards & switches to protect people or will not cycle machine if not in place, fixtures to facilitate proper manufacturing or assembly, TPM
Method – Quality Culture and Program inclusive of, for example: Calibration, Document Control, Contract Review, Supplier Evaluation, Internal Auditing, Product Identification, Inspection & Test Status, Design Control (QFD, verification & validation, design review, DFM & DFA), Process Control (preventive maintenance, control planning, poka yoke, error proofing), Management Review, TPM.