Assessing Maintenance Cost for Design or Re-Design of Complex Machinery

2002 ◽  
Author(s):  
Alley Butler ◽  
Dan Baldwin ◽  
Mohit Kashyap
Keyword(s):  
Cost Model ◽  
Open Architecture ◽  
Maintenance Cost ◽  
Preventative Maintenance ◽  
Maintenance Costs ◽  
Time Value Of Money ◽  
Turbine Generators ◽  
System Data ◽  
The Cost

Maintenance costs are often significant for complex machinery, and organizations that are able to accurately assess maintenance costs for complex machinery can design or re-design the machinery to reduce maintenance expenses. This paper provides a review of relevant reliability theory to provide a background for model construction. The maintenance cost model is then developed from a probabilistic perspective, with a hierarchical breakdown of the complex machinery, and with consideration of the time value of money. A framework for the cost model is offered in which the cost of repair and preventative maintenance is considered along with the downtime costs for repair or preventative maintenance. As a proof of concept, maintenance costs for Ship Service Gas Turbine Generators (SSGTG) are developed from the Navy’s OARS (Open Architecture Retrieval System) data. Problems with data quality and heuristic adjustment of the data are discussed, recognizing that work is ongoing to improve the quality of the Navy’s maintenance data. Cognition Corporation’s Cost Advantage software is used for the modeling effort, providing an ability to focus on maintenance cost at any level of detail and to obtain cost roll up, as needed. Conclusions are drawn with respect to the modeling of maintenance costs for complex machinery.

MODEL BIAYA PEMELIHARAAN FASILITAS PADA BANDAR UDARA NGURAH RAI BALI

1970 ◽  
Author(s):  
Reni Dewita ◽  
I G. A. Adnyana Putera ◽  
I G. Putu Suparsa
Keyword(s):  
Linear Regression ◽  
Cost Model ◽  
Regression Equation ◽  
Maintenance Cost ◽  
Quality Level ◽  
Road Maintenance ◽  
Linear Regression Equation ◽  
Maintenance Costs ◽  
Facility Maintenance ◽  
The Cost

Facilities in an airport requires maintenance activity in order to achieve excellent quality level and able to support activities at the airport to avoid negative impacts, which is the declining quality of the facility that can lead to lower levels of the productivity carried out in an airport. Maintenance facilities at Bali's Ngurah Rai airport need the maintenance costs planning. To get proper maintenance actions,  the maintenance costs early stages of planning phase needs to develop a model of facility maintenance costs that can provide the maintenance costs estimates quickly and accurately. To produce a maintenance costs model we should identify the maintenance activities that exist at Ngurah Rai airport. Maintenance costs data used is within the last 5 years (2007-2011). Using the Cost Significant Model methode and the linear regression equation it showed that several of the facility maintenace significantly affect the facility maintenance costs in the Ngurah Rai Airport which is the cost of passenger terminal building maintenance (X6), the cost of runway maintenance (X1), the cost of taxiway maintenance (X2), the cost of air conditioning installation maintenance (X14), the cost of road maintenance (X4), the cost of vehicle parking maintenance (X5), and the cost of navigation and communication equipment maintenance (X10). There is 3  linear regression equation model which is 1) Y = 11873745878,77 + 0,993 X1 + 0,826 X2 + 0,334 X4 + 1,181 X6, 2) Y = -698840481,94 + 1,327 X1 + 1,716 X2 + 5,516 X5+ 3,060 X14, and 3) Y = 82110363478,07 + 1,013 X1 - 17,223X5 + 22,406 X10 - 12,035 X14. After doing the Cost Model Factor (CMF) test to the three linear regression equation, the most accurate equation is linear regression equation Y = 82110363478,07 + 1,013 X1 - 17,223X5 + 22,406 X10 - 12,035 X14 that has the average ratio 0.006% of the actual cost, so it is the best facility maintenance cost model at Bali's Ngurah Rai Airport.

scholarly journals Mass Rapid Transit Operation and Maintenance Cost Calculation Model

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Rahmat Nurcahyo ◽  
F. Farizal ◽  
Bimo M. I. Arifianto ◽  
Muhammad Habiburrahman
Keyword(s):  
Cost Model ◽  
Calculation Model ◽  
Maintenance Cost ◽  
Cost Calculation ◽  
Rapid Transit ◽  
Maintenance Costs ◽  
Operation And Maintenance ◽  
Transit Operation ◽  
The Cost ◽  
Mass Rapid Transit

Mass rapid transit (MRT) is an efficient transportation mode that is urgently needed by a growing city such as Jakarta, Indonesia. However, limited research has attempted to evaluate the system’s current performance through a comprehensive, unit-based calculation of the costs of MRT operation and maintenance. This research aimed to develop a system for calculating and comparing MRT operation and maintenance costs per kilometer per year. The cost model has three components, namely, capital, operation cost, and maintenance cost, which are, respectively, calculated based on their percentage toward total cost. The cost model calculation determined that Jakarta MRT operation and maintenance costs total USD 8.44 million per kilometer per year. This result was compared to other countries’ MRT operations.

scholarly journals A Survey on Advancing the DBMS Query Optimizer: Cardinality Estimation, Cost Model, and Plan Enumeration

2021 ◽  
Vol 6 (1) ◽  
pp. 86-101
Author(s):  
Hai Lan ◽  
Zhifeng Bao ◽  
Yuwei Peng
Keyword(s):  
Cost Model ◽  
Database Systems ◽  
Enumeration Algorithm ◽  
Estimation Errors ◽  
Cardinality Estimation ◽  
Execution Plan ◽  
Query Optimizer ◽  
Almost All ◽  
The Cost

AbstractQuery optimizer is at the heart of the database systems. Cost-based optimizer studied in this paper is adopted in almost all current database systems. A cost-based optimizer introduces a plan enumeration algorithm to find a (sub)plan, and then uses a cost model to obtain the cost of that plan, and selects the plan with the lowest cost. In the cost model, cardinality, the number of tuples through an operator, plays a crucial role. Due to the inaccuracy in cardinality estimation, errors in cost model, and the huge plan space, the optimizer cannot find the optimal execution plan for a complex query in a reasonable time. In this paper, we first deeply study the causes behind the limitations above. Next, we review the techniques used to improve the quality of the three key components in the cost-based optimizer, cardinality estimation, cost model, and plan enumeration. We also provide our insights on the future directions for each of the above aspects.

scholarly journals Seven Years Maintenance Cost of Implant-Retained Overdentures on Ball Versus Locator ® Abutments.

2020 ◽  
Author(s):  
Jan D'haese ◽  
Carine Matthys ◽  
Hamed Sahak ◽  
Jos Besseler ◽  
Hugo De Bruyn
Keyword(s):  
Quality Of Life ◽  
Initial Treatment ◽  
Treatment Cost ◽  
Maintenance Cost ◽  
Maintenance Costs ◽  
Total Cost ◽  
Initial Cost ◽  
Technical Issues ◽  
Clinical Records

Denture wearers often complain about jeopardized function and reduced quality of life due to lack of prosthesis’ retention. Implant retained mandibular overdentures, on 2 non-connected implants (2IOD) are well-proven solutions to overcome these issues. We prospectively assessed 69 patients and scrutinized clinical records until at least 7 years of function. Thirty-six were retained on Locator ® Abutments (LA) and thirty-tree on Ball Abutments (BA). Both systems were compared regarding the type, amount and total cost of required maintenance. One implants was lost, yielding 98.7% survival after 7 years. In total 438 technical issues occurred: 121 (27.35%) in BA and 317 (72.4%) in LA. Out of these, 343 events (78%) were solved chairside: 191 (43.6%) were replacements of retention caps, 113 (25.8%) were minor acrylic repairs, in 26 (5.9%) pressure ulcers had to be relieved and 13 (3%) related to abutments. LA required 179 insert replacements compared to 12 in the BA group. The overall initial treatment cost was 3850 euro. The average total maintenance cost in relation to the initial cost for the LA and BA groups was 19.11% (range 0% - 82.24%) and 18.91% (range 0% - 113.26%) respectively (P=0.540). Conclusions: The 7-years maintenance costs for a 2IOD is acceptable when the patient is regularly checked and professionally maintained. Most events are easily solvable chairside, but a few patients required more expensive interventions, regardless of the type of attachment used.

Optimal track geometry maintenance limits using machine learning: A case study

2020 ◽  
pp. 095440972097009
Author(s):  
Ahmad Kasraei ◽  
Jabbar Ali Zakeri ◽  
Arash Bakhtiary
Keyword(s):  
Clustering Algorithm ◽  
Cost Model ◽  
Maintenance Cost ◽  
Maintenance Costs ◽  
Corrective Maintenance ◽  
Track Geometry ◽  
Penalty Costs ◽  
Optimal Maintenance ◽  
Maintenance Activities ◽  
Maintenance Model

The aim of this study has been to determine the optimal maintenance limits for one of the main railway lines in Iran in such a way that the total maintenance costs are minimized. For this purpose, a cost model has been developed by considering costs related to preventive maintenance activities, corrective maintenance activities, inspection, and a penalty costs associated with exceeding corrective maintenance limit. Standard deviation of longitudinal level was used to measure the quality of track geometry. In order to reduce the level of uncertainty in the maintenance model, K-means clustering algorithm was used to classify track sections with most similarity. Then, a linear function was used for each cluster to model the degradation of track sections. Monte Carlo technique was used to simulate track geometry behavior and determine the optimal maintenance limit which minimizes the total maintenance costs. The results of this paper show that setting an optimal limit can affect total annual maintenance cost about 27 to 57 percent.

scholarly journals Architects’ View on Design Consideration that Can Reduce Maintenance Cost

2018 ◽  
Vol 9 (3) ◽  
pp. 193-200
Author(s):  
Oladunni Oluwatoyin Izobo-Martins ◽  
Ekhaese Eghosa ◽  
Ayo-Vaughan Kunle Emmanuel
Keyword(s):  
Building Design ◽  
Design Approach ◽  
Operational Performance ◽  
Educational Institutions ◽  
Maintenance Cost ◽  
Building Structures ◽  
Building Maintenance ◽  
Building Typology ◽  
The Cost

Abstract Buildings are designed with the intent of lasting for a certain period of time. Building maintenance in different building typology is described as multi-faceted activities which involve planning, directing, controlling and organizing resources for the sustenance of the building’s physical, functional and operational performance. The research focused on ways cost of maintaining a building was done, effectively or efficiently with the influence of the design approach used. Literatures of works pertaining to building maintenance were reviewed to identify the various impacts, influences that a building design would have on the cost of maintaining any building type. Maintenance departments of educational institutions were surveyed and data analyzed. The study revealed that maintenance culture of buildings could either be positive or negative, based on the quality of design approach used. The study recommends a proper review of building codes and regulations by organizations intending to erect building structures with a view of designers to specified standards and prevent excess maintenance cost in the future.

scholarly journals Recent Trends in Maintenance Costs for Façades Due to Air Pollution in the Oslo Quadrature, Norway

Atmosphere ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 529 ◽  
Author(s):  
Grøntoft
Keyword(s):  
Air Pollution ◽  
Maintenance Cost ◽  
Response Functions ◽  
Maintenance Costs ◽  
Building Maintenance ◽  
Exposure Response ◽  
Local Air Pollution ◽  
Recent Trends ◽  
Steel Surfaces ◽  
The Cost

This study assesses changes since 1980 in the maintenance cost of the façades of the historical 17th to 19th century buildings of the Oslo Quadrature, Norway, due to atmospheric chemical wear, including the influence of air pollution. Bottom up estimations by exposure–response functions for an SO2 dominated situation reported in the literature for 1979 and 1995 were compared with calculations for the present (2002–2014) multi-pollutant situation. The present maintenance cost, relative to the total façade area, due to atmospheric wear and soiling was found to be about 1.6 Euro/m2 per year. The exposure to local air pollution, mainly particulate matter and NOx gases, contributed to 0.6 Euro/m2 (38%), of which the cost due to wear of renderings was about 0.4 Euro/m2 (22%), that due to the cleaning of glass was 0.2 Euro/m2 (11%), and that due to wear of other façade materials was 0.07 Euro/m2 (5%). The maintenance cost due to the atmospheric wear was found to be about 3.5%, and that due to the local air pollution about 1.1% of the total municipal building maintenance costs. The present (2002–2014) maintenance costs, relative to the areas of the specific materials, due to atmospheric wear are probably the highest for painted steel surfaces, about 8–10 Euro/m2, then about 2 Euro/m2 for façade cleaning and the maintenance of rendering, and down to 0.3 Euro/m2 for the maintenance of copper roofs. These costs should be adjusted with the importance of the wear relative to other reasons for the façade maintenance.

scholarly journals ANALYZE MACHINE MAINTENANCE COST WITH CORRECTIVE METHOD AND PREVENTIVE METHOD TO INCREASE PRODUCTION RESULT

2019 ◽  
Vol 2 (1) ◽  
pp. 1-8
Author(s):  
Chamdan Purnama
Keyword(s):  
Production Process ◽  
Maintenance Cost ◽  
Maintenance Costs ◽  
Machine Maintenance ◽  
Maintenance System ◽  
Preventive Method ◽  
Engine Maintenance ◽  
The Cost ◽  
Corrective Method

The object of research is the engine maintenance system that is on the CV. Fajar Offset. The production process is often disrupted by the high amount of damage, which results in maintenance costs. Machines that often experience damage affect the printed product to be produced. The amount of downtime will affect the profits that will have an effect on the swollen maintenance costs of the budget that has been prepared. The purpose of this study is to analyze the cost of machine maintenance with corrective method and preventive method against increase production result. The results showed that machine maintenance was done by corrective method and preventive method proven to have an effect on increase production result.

Preview

2010 ◽  
pp. 47-63
Author(s):  
Songmei Yu ◽  
Vijayalakshmi Atluri ◽  
Nabil Adam
Keyword(s):  
Data Warehouse ◽  
Spatial Data ◽  
Cost Model ◽  
Cost Savings ◽  
Maintenance Cost ◽  
Materialized View ◽  
Spatial Part ◽  
Spatial Data Warehouse ◽  
Composite Lattice ◽  
The Cost

One of the major challenges facing a data warehouse is to improve the query response time while keeping the maintenance cost to a minimum. Recent solutions to tackle this problem suggest to selectively materialize certain views and compute the remaining views on-the-fly, so that the cost is optimized. Unfortunately, in the case of a spatial data warehouse, both the view materialization cost and the onthe- fly computation cost are often extremely high. This is due to the fact that spatial data are larger in size and spatial operations are more complex than the traditional relational operations. In this chapter, the authors propose a new notion, called preview, for which both the materialization and on-the-fly costs are significantly smaller than those of the traditional views. Essentially, to achieve these cost savings, a preview pre-processes the non-spatial part of the query, and maintains pointers to the spatial data. In addition, it exploits the hierarchical relationships among the different views by maintaining a universal composite lattice, and mapping each view onto it. The authors present a cost model to optimally decompose a spatial query into three components, the preview part, the materialized view part and the on-the-fly computation part, so that the total cost is minimized. They demonstrate the cost savings with realistic query scenarios, and implement their method to show the optimal cost savings.

Research on Maintenance Cycle Optimization of Power Generation Equipments Based on PSO

2013 ◽  
Vol 391 ◽  
pp. 358-361
Author(s):  
Yi Gang Liu ◽  
Zhu Liu ◽  
Jun Hui Liang ◽  
Si Zhe Liao ◽  
Kai Ping Yang
Keyword(s):  
Power Generation ◽  
Cost Model ◽  
Decision Making Process ◽  
Maintenance Costs ◽  
Maintenance Cycle ◽  
Optimal Maintenance ◽  
Complex Decision Making ◽  
Complex Decision ◽  
Risk Cost

Maintenance cycle optimization of power generation equipments is a complex decision-making process which needs to consider risk, availability and cost .This paper uses Probabilistic risk assessment (PRA) technology in maintenance cycle optimization, establishes multi-component maintenance risk-cost model,conducts comprehensive optimization best cycle and the lowest cost. Introduce PSO method as optimized decisions, find the optimal maintenance cycle for the target of the lowest total maintenance costs and achieving the required level of safety, improve optimized speed and the quality of reconciliation.

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