Curriculum - TPK4140 - Maintenance optimization

Corse compendium (J. Vatn)

Veien frem til “World Class Maintenance”: Maintenance Optimisation

Ch 1 - Introduction

Ch 7 - Failure Models relevant to Maintenance

• Understand the qualitative aspects of the 4 models
• Understand the type of maintenance for each model
• Understand the decision variable(s) for each model
• Basically this is covered in Section 7.2

Ch 9 - Structure function and system reliability

• Be able to map a system description into a reliability block diagram (RBD)
• Be able to derive the structure function for simple serial and parallel structures
• Be able to calculate component reliability, and in particular understand the formulas A = MTTF/(MTTF + MDT), and U = MDT/(MTTF + MDT) ≈ MDT / MTTF.
• Be able to use the structure function as basis for calculating the system reliability

Ch 10 - Reliability Centred Maintenance (RCM)

• Be able to explain the main steps of an RCM analysis
• Based upon logical reasoning be able to recall the questions and answers leading up to maintenance tasks when using the RCM decision logic
• Be able to use the RCM decision logic in a practical setting

Ch 11 - Simplified Risk Modelling and Optimising

The chapter covers a range of situations for optimization. As a minimum:

• Be able to explain the meaning of the effective failure rate, λ_E(τ)
• Be able to argue why the cost equation for age based replacement often takes the form: C(τ) = C_PM/τ + λ_E(τ)[C_CM + C_EP + C_ES + C_EM]
• Be able to explain why we often write: C_EP = Pr(P) ⋅ (C_P ⋅ MDT +C_T)
• Be able to use the cost equation to obtain the optimal maintenance interval for practical situations