Maintenance Scheduling Challenges

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Questions and Answers

What do deterministic techniques assume about maintenance workload and other parameters?

  • They are unknown and unpredictable
  • They are known constants (correct)
  • They are random variables
  • They are only partially known

What type of techniques are more representative of real life due to the existence of uncertainty?

  • Mathematical programming
  • Stochastic techniques (correct)
  • Statistical techniques
  • Deterministic techniques

What is used to identify the probability distributions that best describe random variables in stochastic capacity planning?

  • Modified transportation tableau method
  • Mathematical programming
  • Queuing models
  • Statistical distribution-fitting techniques (correct)

What type of models consider various uncertainties present in real-life maintenance systems?

<p>Stochastic models (B)</p> Signup and view all the answers

What type of technique is used to analyze the uncertainty in maintenance capacity planning?

<p>Stochastic technique (A)</p> Signup and view all the answers

What is a characteristic of stochastic models for maintenance capacity planning?

<p>They consider uncertainties in maintenance workload and capacity (A)</p> Signup and view all the answers

What are two examples of stochastic techniques mentioned in the text?

<p>Queuing models and stochastic simulation (D)</p> Signup and view all the answers

What is a difficulty in constructing and solving stochastic models for capacity planning?

<p>They are generally more difficult to construct and solve (A)</p> Signup and view all the answers

What type of models assume that maintenance workload and capacity are known constants?

<p>Deterministic models (C)</p> Signup and view all the answers

What do uncertainties in maintenance surround, according to the text?

<p>Both maintenance workload and capacity (A)</p> Signup and view all the answers

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Study Notes

Maintenance Scheduling Challenges

  • Maintenance activities are uncertain in terms of duration and resource requirements
  • Maintenance activities are highly related in terms of precedence relations or relative priority
  • Tasks can be divided into subtasks each with different requirements
  • Tasks can be interrupted or canceled due to changes in production conditions or maintenance requirements

Project Scheduling and Maintenance

  • Project management techniques can be utilized for scheduling the maintenance operations
  • Two primary network programming techniques used in project scheduling are: • Critical Path Method (CPM) • Program Evaluation and Review Technique (PERT)

Performance Measurement and Maintenance

  • Maintenance Performance Measurement (MPM) is a multidisciplinary process of measuring and justifying the value created by maintenance investment
  • MPM takes into account the organization's stockholder's requirements viewed strategically from the overall business perspective

Maintenance Workload Forecasting and Capacity Planning

  • Carrying out an effective maintenance operation requires efficient planning of maintenance activities and resources
  • Maintenance workload consists of two major components: • Scheduled and planned preventive maintenance • Emergency breakdown failure maintenance

Maintenance Forecasting

  • Forecasts of the future maintenance workload are needed to plan well for maintenance resources
  • Forecasts are typically classified into three main types: • Short-term (days to weeks) • Intermediate-term (weeks to months) • Long-term (months to years)

Maintenance Capacity Planning

  • The main objective is to assign fixed maintenance capacity (resources) to meet fluctuating maintenance workload
  • Capacity planning determines the appropriate level and workload assignment of different maintenance resources in each planning period
  • Examples of maintenance resources include spare parts, manpower, tools, instruments, time, and money
  • Capacity planning decisions include the number of employees, the backlog level, overtime workload, and subcontract workload

Capacity Planning Strategies

  • Four basic strategies to match the fixed capacity with fluctuating monthly demands: • Chase strategy • Leveling strategy • Demand management • Subcontracting
  • Hybrid strategies are generally considered the best approach

Capacity Planning Techniques

  • Deterministic techniques assume that the maintenance workload and all other significant parameters are known constants
  • Two deterministic techniques: • Modified transportation tableau method • Mathematical programming
  • Stochastic capacity planning techniques assume that the maintenance workload and possibly available capacity and other relevant parameters are random variables
  • Two examples of stochastic techniques: • Queuing models • Stochastic simulation

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