Failure Rates and Deterioration of a system define the frequency of maintenance action, which have to be taken in order to keep the system functional. Planning of maintenance gets especially crucial when the system’s complexity increases. Every component of this system shows a different behaviour concerning

• the speed of deterioration
• the failure rates
• the importance/ priority of maintaining
• the frequency and urgent of maintenance,

For complex systems it is important to understand the relations between the components to already adjust beneficial settings before usage. Thus, the choice of materials, their quality as well as the way of construction influence the speed of deterioration over time.

The aim of maintenance planning is to find a balance between the system’s performance quality and the costs resulting from the maintenance actions as well as environmental impacts. This will be done in the following by applying a Multi-Objective Optimization (MOO) in order to find the best maintenance plan for a combined and complex system. As part of the MOO, the systems emission will be studied thoroughly, while focusing on the most dominant emissions: CO₂, NO_x and SO₂. These will be studied in the context of material extraction, material processing, fabrication, production and system repairs (cradle-to-gate-analysis). The integrated system consists of four independent systems, which should be combined by integrating their individual life cycle models. Resulting in a holistic maintenance plan, the MOO should give an overview of how small changes of one individual system’s maintenance planning effect the other systems as well as the holistic systems while balancing the life-cycle costs and performance quality at the same time. Thus, resulting in the most efficient and effective use of resources and achieving the best performance of all systems during life time.

---

Content of Pages

1. Integration Context

•      1.1 Wooden Frame (Flour Factory)
•      1.2 Xpelair (Mechanical Ventilation System)
•      1.3 Stellio (Solar Power Tower Plant)
•      I.4 Isolated Footing (Single Storey House)

2. Maintenance Strategy 

• 2.1 Maintenance Strategy of Individual Systems
• 2.2 Integrated Maintenance Strategy

3. Life-Cycle Inventory Analysis

4. Multi-Objective Optimization

5. Interpretations and Decision making

---

Download 

The code can be downloaded by clicking the download button bellow and copying it or right click on the ‘Download’ button and click on ‘Save link as …’ then save the R file to your computer. The file is .txt format please convert it to .R.

The CSV file is in the excel workbook format please convert it to .csv format.

.      .       .       .      .      .R code                                                                                                                                                                                                                                                                                                         CSV File