1.2 Maintenance Policies This is to create a reference for development into maintenance strategies, and also the challenges that come with its integration with FMECA elements. The main purpose of maintenance in an industrial perspective is to reduce the business risks. In general, operation and maintenance is synonymous with high level of availability, reliability and assets operability linking directly with production capacity, productivity and business profit. [7]
Today, the role/purpose of maintenance is no more limited to immediate reaction to emergencies and over-power problems. The work is oriented for ‘Maintenance Excellence’, which is a subset of reliability excellence and redefines traditional roles and responsibility …show more content…
With help of FMECA, potential failure modes as well as functional failures within a system and its equipment analyze mode of failure cause and effect, identifies potential weak links, and puts forward improvement measures. [13] The severity and probability indices are added together to yield the criticality index. It represents a measure of the overall risk associated with each combination of severity and probability. This method is commonly used in preliminary design when the failure probabilities are not …show more content…
Weaknesses include the extensive labor required, the large number of trivial cases considered, and inability to deal with multiple-failure scenarios or unplanned cross-system effects such as sneak circuits. According to an FAA research report for commercial space transportation,
Failure Modes, effects, and Criticality Analysis is an excellent hazard analysis and risk assessment tool, but it suffers from other limitations. This alternative does not consider combined failures or typically include software and human interaction considerations. It also usually provides an optimistic estimate of reliability. Therefore, FMECA should be used in conjunction with other analytical tools when developing reliability estimates. [16]
1.2.7 Limitations of FMECA
1. Critical failure modes, causes, or effects that are not recognized by the designer(s) will not be addressed by the FMECA.
2. FMECA does not account for multiple-failure interactions, meaning that each failure is considered individually and the effect of several failures is not accounted for.
3. FMECA does not analyze dangers or problems that may occur when the system is operating properly.
4. Human factors are not
Today, the role/purpose of maintenance is no more limited to immediate reaction to emergencies and over-power problems. The work is oriented for ‘Maintenance Excellence’, which is a subset of reliability excellence and redefines traditional roles and responsibility …show more content…
With help of FMECA, potential failure modes as well as functional failures within a system and its equipment analyze mode of failure cause and effect, identifies potential weak links, and puts forward improvement measures. [13] The severity and probability indices are added together to yield the criticality index. It represents a measure of the overall risk associated with each combination of severity and probability. This method is commonly used in preliminary design when the failure probabilities are not …show more content…
Weaknesses include the extensive labor required, the large number of trivial cases considered, and inability to deal with multiple-failure scenarios or unplanned cross-system effects such as sneak circuits. According to an FAA research report for commercial space transportation,
Failure Modes, effects, and Criticality Analysis is an excellent hazard analysis and risk assessment tool, but it suffers from other limitations. This alternative does not consider combined failures or typically include software and human interaction considerations. It also usually provides an optimistic estimate of reliability. Therefore, FMECA should be used in conjunction with other analytical tools when developing reliability estimates. [16]
1.2.7 Limitations of FMECA
1. Critical failure modes, causes, or effects that are not recognized by the designer(s) will not be addressed by the FMECA.
2. FMECA does not account for multiple-failure interactions, meaning that each failure is considered individually and the effect of several failures is not accounted for.
3. FMECA does not analyze dangers or problems that may occur when the system is operating properly.
4. Human factors are not