im - 1.3 maintainability engineering - marzo 2013

7/28/2019 Im - 1.3 Maintainability Engineering - Marzo 2013

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INTRODUCCION A LA

INGENIERIA DE

MANTENIBI

LIDAD

CONFIABI

LIDAD

DISPONIBILID

AD


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RA

M

S


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MAINTAINABILITY

ENGINEERING


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MAINTAINABILITY (M)

Definition 1:


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Definition 2:


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MAINTAINABILITY (M)

Definition 3:


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MAINTAINABILITY (M)

It is a function of:


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MAINTAINABILITY (M)

Combination of Factors


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MAINTAINABILITY (M)

Measures :

Maintainability can be measured in terms of :

Maintenance Elapsed-time FactorsPersonnel labour-hours rates

Maintenance Frequencies Factors

Maintenance Cost Factors, andRelated logistic support factors.


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MAINTAINABILITY (M)

Measures 1:


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Measures 2:


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MAINTAINABILITY (M)

Measures 3:


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Measures 3:


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MAINTAINABILITY (M)

Maintenance ElapsedTime Factors:


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Maintenance ElapsedTime Factors:

1. Corrective maintenance : the Unscheduled action

accomplished, as a rersult of failure, to restore a

system to a specified level of performance.

2. Preventive maintenance: the Schedule actionsaccomplished to retain a system at specified level of

performance by providing systematic inspection,

detection, servicing, calibration, condition monitoring,

and or replacement of critical items to prevent

impending failures.


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MAINTAINABILITY (M)

Homework

Given the following data covering a random sample of 50

corrective maintenance repair actions cycles (minutes) on a

typical equipment item, calculete the:1. Maximun, Minimum and Average (Arithmetic Mean)

Times.

2. Frecuency Distribution of repair times

3. Histogram of corrective maintenance actions4. Frecuency polygon for repair times (Probability

distribution)

5. Standard Deviation ()

6. Normal Distribution


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MAINTAINABILITY (M)

Corrective Maintenance Times (Minutes)

40 58 43 45 63 83 75 66 93 92

71 52 55 64 37 62 72 97 76 75

75 64 48 39 69 71 46 59 68 64

67 41 54 30 53 48 83 33 50 63

86 74 51 72 87 37 57 59 65 63


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MAINTENANCE DOWN TIME (MDT)


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MAINTAINABILITY (M)


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im - 1.3 maintainability engineering - marzo 2013

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