Knowledge Management on Asset Management for End of Life Products

Because of considerable high labor cost in developed countries particularly Japan and Korea, the end of life products required manual or semi-manual processes have been relocated to developing countries. In addition, the relocation creates an immediate financial profit on old asset sale while it is revalued to 30 % of its initial value in the new relocated factory. The relocation is not only production location change but also the experience in operation and maintenance process to its Foreign Direct Investment affiliate. Since the old product and process are both nearly at their end of life, it needs to extend the life as long as the product still exists in the market. In order to immediately launch the operation as well as to retain the knowledge, therefore, the asset management and new maintenance modes are proposed at all product, process and people aspects to improve reliability of the old asset and to minimize maintenance cost. The research in this paper was carried out on a Korean relocated electronic factory in Thailand. The result clearly shows that the reliability, quality, cost and intellectual capital are significantly improved.


Introduction
There has been a significant rapid increase in Foreign Direct Investment (FDI) outflow to developing countries in Asian, Latin America since the late of 1980's. [1] Normally, FDI transfer tangible assets and intangible assets to the FDI overseas, where it provides some potential benefit. [2] For other reason, FDI may need to protect its cost competitiveness advantage through the transfer. [3] The FDI from East Asian countries also invest in developing countries in Asia. Most of Japanese FDI moves their production to a new location where the production costs were lower. [4] Anyhow, the Korean FDI invests aboard to utilize the lower labor cost and to reconstruct the less competitive domestic industries. [5] At the early stage, the motive frequently is driven by the cost competitiveness. The old equipment, which is running beyond its engineering designed life, the life cycle cost of machine replacement shall be a significant financial burden. Because the life cycle cost includes not only the acquisition costs, but also the ownership costs and the disposal costs. [6] Moreover, it needs a considerable decision to invest in the production of the old 'sunset' product in the industry of high precision or high manufacturing technology.
It is not justified to invest on new machinery for the old products, which normally have no market growth or a declining market. Therefore, the retrofit of a company's equipment with the shift of the maintenance system for a longer profitable period is the most appropriate solution. [7] Even the old products cannot make a lot of profit, but the product owner company can keep the market as well as spare part service to customers. The product has no longer investment cost, and the production equipment is still available. Moreover, the production technology is nearly obsolete or requires unskilled labor. In the developed countries, the labor cost is much more expensive.
This research uses a case study of a FDI who loses their cost competitiveness in an old location in a developed country. The FDI chooses to relocate the old machinery to the cheaper operation cost location in a developing country.

Literature Review
In this relocation scenario, new technology should be employed in order to save the cost of unskilled labor. Therefore, the old technology production line has to be replaced by a new one, and then, relocate the old one to developing countries. The knowledge in operation and maintenance for the equipment should be transferred from the old plant in the developed country to a new factory in developing country. [8] Finally the new plant tries to keep running the production as long as possible until it has no longer customers or its production cost is not justified. Therefore, its corrective, preventive, and inspection maintenance should be changed into condition based, reliability based and risk based maintenance respectively. Thus, the experience in operation and maintenance is needed to be utilized in order to extend its operational life. [9] The weak points of the equipment can be identified from its historical corrective maintenance records. Some equipment's running conditions should be timely monitored. Moreover, the preventive maintenance schedule should more focus on its unreliable parts. [10] The periodic inspection maintenance should concentrate on some major parts. The deterioration mechanism of the major parts should be followed up properly.
From an asset management's historical perspective, the learning processes of a factory on the operation and maintenance are develop through the operation and maintenance activities. [11] The learning model is based on experience collectively gained over a period of time. Anyhow, it is a time consuming process with many staffs involved to develop best practices. Hence, it requires a step-by-step development from breakdown to proactive maintenance. [12] In the breakdown maintenance scheme, equipment is disassembled and assembled to get the basic knowledge in plant installation and commissioning. Corrective maintenance scheme represents knowledge on diagnosis when failures occur. In preventive maintenance scheme, most activities involve resource scheduling to avoid unplanned outages. Predictive maintenance scheme indicates the abilities of the knowledge workers to foresee the future faults and events based on the present condition of equipment. [13] Finally, with more knowledge gained over an operating period, the proactive maintenance indicates abilities of the knowledge workers to assess the asset lifetime as well as its' parts that consequently assists the utilities in the decision making on the replacement or the refurbishment. Furthermore, the associated costs and risks can be reduced from the experience of maintenance while more knowledge has increasingly been gained over a period of time.

Methodology
A Korean FDI relocated electronic factory in Thailand has been selected as a case study. The asset management is introduced to improve the factory preventive maintenance scheme. The asset management procedure includes three stages; 1) Asset Survey 2) Knowledge Management applied in Asset Study and 3) Maintenance mode selection. See Fig. 1

Fig. 1. Stages of the methodology
Firstly the asset survey shall be conducted. Each asset in the factory needs to be evaluated for its replacement cost. Normally the replacement cost can be received from its manufacturer for brand new equipment. But in some cases, equipment has already been no longer manufactured. Then the replacement cost can be assumed as the price when it was initially purchased. The prioritization should be done from the most expensive replacement cost to the least one. Top three expensive assets should be in a short list under consideration. Later, the aged profile curve should be plotted for high priority equipment. Normally, an individual machine that is beyond 20 years should be focused. The further focus should be given to the too old ones. Then, performance including availability and reliability of the old assets should be evaluated.
Secondly, Knowledge Management shall be applied in Asset Study. The risk assessment should be done on the targeted assets by using risk assessment matrix, and the knowledge acquisition should be done on its design versus operation, maintenance history and deterioration mechanism.
Finally, based on the acquired knowledge, the suitable maintenance method such as Risk Based Inspection, Reliability Centered Maintenance or Instrumental Protective Function for particular equipment is then selected to improve the traditional preventive maintenance procedure.

Replacement cost
In evaluating the replacement cost, it is required to classify the overall asset. This asset is classified into 3 categories which are; -Class A, the main machinery which directly affect to the production capability -Class B, the supporting machinery to the main machinery -Class C, instrument which does not need maintenance service In this study, only machinery in class A shall be identified the replacement cost. The replacement cost is evaluated at the new purchasing price of machinery from the existing manufacturers. The example of replacement cost of Bonding and Molding machinery that their life are over than 5 years, are evaluated as following Fig. 2 and Fig. 3.  According to the age categories in this study, there are 4 recovery operations for 4 age levels, aiming at recapturing value from its End of Life as follows, -Recycling the breakdown and low performance machine which its life is more than 20 years. The purpose is to reuse parts by various separation processes and reusing them in the other machine. -Repairing and reusing the breakdown machine but still in a good performance which its life is from 10 years in order to return it service in working order by changing parts. -Reviewing the maintenance plan of the machine that its life is from 5 years by increasing PM or applying Reliability Centered Maintenance (RCM), Risk Based Inspection and Monitoring only the Instrumental Protective Function in order to protect the low service performance. -Relying on the manufacturing manual to maintain the operation function of machine which its life is less than 5 years

Performance evaluation
The factors to evaluate the Service Performance of the machinery include 12 variables (See Table 1.). From the normalization graph of variable number 5 to 12, it is found that SOT-XXX production line possesses the overall highest performance among three production lines (See Fig. 7.). It is suggested that the production line of TO-XX and TO-XXX product should decrease the Preventive Maintenance. Some machines should be recycled or refurbished. The running capacity of these two production lines is still lower than the acceptable ratio, so there is an opportunity to build a stock of regularly ordered product.

Risk Assessment
Risk Assessment Matrix is used to assess the risk of each machine. It requires the participation of knowledge workers and the experienced technicians. This is needed to assess the possibility to be breakdown and the seriousness of problem and assess risk into three levels (High -Medium -Low) together with its part's lifetime while providing the subsequent action needed of each part. (see Fig. 8

Asset Study: Engineering design, History and Deterioration Mechanism
After assessment and collecting the lifetime of each part of the machine by the risk assessment matrix, the experienced technicians shall examine the machinery engineering design, its operation, maintenance history and parts deterioration mechanism in order to understand and plan its maintenance mode. See the sample of the asset study of the Back Inline System (BIS) machine in Fig. 9.

Fig. 9. Engineering design, operation and maintenance history study
The machine part is classified into 5 categories; Static equipment, Rotating/Moving Equipment, Instrumentation, Instrumental Protective Function (IPF) and Static Equipment which identifies its lifetime. The Deterioration Mechanism study of each part in 5 categories is shown in Fig. 10.
After studying the asset, which is based on the acquired knowledge of machinery engineering design, its operation, maintenance history and parts deterioration mechanism; the maintenance mode shall be suitable and selective according to its design and deterioration mechanism. There are three selective maintenance modes, Risk Based Inspection (RBI), Reliability Centered Maintenance (RCM) and Instrumental Protective Function (IPF), proposed for individual equipment, which is described in Table 2.

Integration of new maintenance mode to existing maintenance system
Through the process of asset survey and study, a new maintenance mode is introduced but it should be applied with the existing maintenance system in the firm. This Korean FDI already has its own maintenance system, but it focuses on the Preventive maintenance, which may lead to the excessive maintenance cost. Therefore, the RCM, RBI and IPF maintenance mode shall reduce the over-maintenance cost. The new maintenance mode integrating with the existing maintenance system can be illustrated in Fig. 11.  Fig. 11. Reliability Centered Maintenance integrating with existing maintenance system The old PM system provided a PM master plan based on machine manufacturer recommendation. The technician took an action on daily monitoring, cleaning, lubricating and changing parts and report in the PM, then, input the report in CMMS. After RCM integrating, the technicians study machine deterioration mechanism and PM history, then, make Risk Assessment (RAM) and RBI (Risk Based inspection) based on their experience. The technicians use RAM data to build a maintenance Mode instruction and, together with their experience, make a Machine Life Time Justification manual. After input to CMMS, then, the RBI plan for old machine and PM plan for new machinery, which is not over 5 years old, are scheduled. Later technician maintain the machine according to the prior designed maintenance mode. Finally, the problem in the maintenance work is discussed and feedback to the maintenance team for improvement.

Reliability and Quality Improvement
There is an indicator showing that after applying the new selective maintenance mode, in the middle of 2011, the process reliability is improved. Considering the record of Outgoing Quality Control (OQC) of all products after the production line applied the new maintenance mode. The number of OQC reject caused by machine failure at the end of 2012 was significantly reduced 81% from the first half 2011, See Table 3.

Maintenance Cost Improvement
There is also a record of maintenance expense that shows a big improvement in maintenance cost before and after the application of new maintenance mode. (See Table 4.) Initially, they generate the Preventive Maintenance cost plan at the beginning of the fiscal year. The first half of 2011, before the application of new selective maintenance mode, they spent 94% of the annual budget. But after the application of new maintenance mode, the cost of maintenance was reduced to 37% of the budget.

Conclusion
Since the core manufacturing factors are people, process and product, therefore the management of the end-of-life product manufacturing also requires the improvement of those three factors. A new financial strategy of the obsolete product should be applied to stretch its intellectual capital. The asset management plan should be applied to improve the manufacturing process. And the knowledge management should be applied to improve the knowledge of manufacturing technical people. These can make extra corporate value including stock market value and customer satisfaction. Therefore, the problem of product and process end of life can be solved by the shift of maintenance system with knowledge management. The case study in this paper also showed the explicit improvement of reliability, quality and product cost. Moreover, it also retains the knowledge of the experienced technicians before their retirement or resignation. The whole process of Asset management could help the firms to endure their product life cycle.