Priority of Key Success Factors (KSFS) on Enterprise Resource Planning (ERP) System Implementation Life Cycle

This study presents the priority of key success factors (KSFs) on Enterprise Resource Planning (ERP) system implementation life cycle. There are twenty KSFs considered in this study. They were chosen from literature review. The KSFs are classified into five stages of ERP implementation life cycle; namely: project preparation, technology selection, project formulation, implementation/development and deployment. To address the study objectives, a survey questionnaire was considered the most appropriate research method. It was sent to 74 companies that have been implementing ERP system for at least one year. The respondents are staff at management level, IT staff and users involved in the development and use of the ERP system. The survey received 248 responses from 740 quesitionnaires that were sent to the companies. To find the priority of KSFs on ERP implementation life cycle, a quantitative analysis is applied to identify the weighting of KSFs toward ERP implementation success. The success of ERP implementation can be measured through five indicators; namely: system quality, information quality, service quality, tactical impact and strategical impact. Based on the weighting of KSFs on each stage of ERP implementation life cycle, it is found that the communication is most critical KSF on project preparation stage (ρ = 0.664). While the strong ERP product (package selection) is most critical KSF on technology selection stage (ρ = 0.554). The change management is most critical KSF on project formulation stage (ρ = 0.406), and on implementation/development stage, user training is the most critical KSF (ρ = 0.422). This study is expected to improve knowledge in ERP implementation, especially the role of KSF on each stage of ERP implementation life cycle.


Introduction
Enterprise Resource Planning (ERP) system is an integrated information system that is used to support business processes and resource management within an organization.These systems integrate between one business unit with other business units.With the implementation of this system in an organization to support the company's operations, it is expected to provide optimum benefit for the company.This is especially needed by the various industrial sectors in this era of globalization.So, the company can compete with competitors or even create a competitive advantage.In addition, ERP selection is also done with various strategic reasons both tangible and intangible.
ERP software has grown rapidly the last 10 years.According to AMR Research, ERP system sales increased dramatically in 2004 reached 23.6 billion dollars.Market growth rate remained stable in 2005, and the end of 2009 the ERP software sales reached 24.5 billion dollars (Hestermann, Anderson & Pang, 2009).One of the largest ERP companies is SAP AG (a German Company).The company controls about 40% of the market and it is the third largest software company in the world.Based on data from SAP AG, about 80% of SAP's sales occur in Europe and the United States, while the remaining 20% spread in Asia.
The main reason of the investment made by companies is due to the ERP system integration business and it promises to improve the company's competitive position in the market (Luo and Strong, 2004).Some benefits have also been frequently cited in several studies related to the ERP system, such as: data and application integration as a substitute for legacy systems, lower cost and faster deployment compared with in-house development, adopting ERP best practices into business company processes (Markus, 2004).However, some other cases show that investments of Information Technology (IT) with substantial funds may not necessarily bring optimal benefits.This is shown by Dantes & Hasibuan (2010) who illustrate that nearly 60% of ERP implementation in Indonesia in both public and private companies have failed.Even big companies in the world such as: FoxMeyer Drug and Dell Computer have spent quite a lot of funds for implementation of ERP but the benefits obtained are not optimal (Kalakota and Robinson, 2001).It was reported that FoxMeyer like all large companies engaged in pharmaceutical declare themselves bankrupt because of failure in implementing the system.In line with the above data, a survey conducted by Robbins-Giowa in American companies in 2001 found that about 51% of companies in America have failed in the implementation of ERP (IT Cortex, 2003), In China, it is estimated that the ERP implementation success rate is only 10% (Zhang et al., 2003).

Theoretical Background
The following sub sections discuss ERP implementation life cycle, KSFs on ERP implementation process, and measurement of ERP implementation success model.

Implementation Life Cycle
ERP implementation is changing from legacy systems into ERP system.It is more on process change instead of technology change itself.This section will describe the stages on ERP implementation from previous research, in which each model has different stages.In general, ERP implementation process has three main stages: pre-implementation, implementation and post-implementation (Capaldo and Rippa, 2009).However, some researchers considered each stage to be sub-stages according to their perspectives.(3) Project formulation -covers the business blueprint that will be used in implementation/development, such as: functional requirement building, development implementation plan, etc.
(4) Implementation/Development -system configuration/customization and makes the system running in production environment (5) Deployment -stabilizing, eliminating "bugs", maintaining systems, supporting user, getting results, system upgrading and getting to normal operations.

Key Success Factors (KSFs) in ERP Implementation Process
The The quantitative analysis using product moment will be used to determine the weighting of each KSF on ERP implementation success.With this weight, the priorities of KSF on ERP implementation success will be known.This is important because the company is not able to fulfill all the KSFs in ERP implementation process.

Measurement of ERP Implementation Success Model
To know the weighting of KSF on ERP implementation success, the researchers attained the coefficient correlation between KSF and ERP implementation success.In this study ERP implementation success can be measured by system quality, information quality, service quality, tactical impact and strategic impact.It is different from the study by Gable et al. (2003) that measures the Enterprise System Success by 5 indicators, namely: system quality, information quality, satisfaction, individual impact and organizational impact.Whereas McLean and DeLone (2002) measure the information system success by system quality, information quality, service quality, use, user satisfaction and net benefits.This is a revision of the previously proposed model, where the information system success is measured by the following indicators: system quality, information quality, use, user satisfaction, individual impact and organizational impact (McLean and DeLone, 1992).Below, there are indicators used in this study to measure an ERP implementation success in an organization.

Figure 1. Measurements of ERP Implementation Success (Dantes & Hasibuan, 2011b) Research Methodology
The key objective of this study is to examine a number of issues regarding the weighting of KSFs and to find the priority of KSFs at each stage of ERP implementation life cycle.An ERP implementation success is the score of success in its implementation in an organization.The indicators measured include system quality, information quality, service quality, tactical impact and strategic impact.To address the study objectives, a survey questionnaire is considered the most appropriate research methodology.It was sent to 74 companies that have been implementing ERP system for at least one year.However, the respondents come from 37 companies representing 10 different industrial sectors.The survey received 248 responses from 740 quesitionnaire sent to the companies.The respondents are staff at management level, IT staff and users involved in the development and use of ERP system.Table 3 shows the characteristics of the sample.
Other than the questionnaire, this present study also conducted interviews and document observation to support the research data.Interviews were conducted with several ERP consultants at the level of technical as well as functional, IT Staffs and with users involved in the ERP implementations.The interviews were conducted in structured and unstructured methods.The questions posed focus on: (1) key success factors on ERP implementation process; (2) ERP implementation success; and (3) ERP implementation process.

Discussion & Result
This section discusses the weighting of key success factors (KSFs) and priority of KSFs in ERP implementation life cycle.

The Weighting of KSFs on ERP Implementation Success
To determine the success of ERP implementation in this study, there are 5 components that are measured, namely: system quality (SQ), information quality (IQ), service quality (SEQ), tactical (TAI) and strategical impact (STI).The following figure below shows the weighting of KSF toward SQ, IQ, SEQ, TAI and STI.The researchers also show the weighting of KSF toward ERP implementation successaverage score of SQ, IQ, SEQ, TAI and STI.
The Pearson correlation test is used to find the weighting of each KSF toward ERP implementation success.From 248 respondents, there are 14 (5.65%) respondents as an outlier data (the normality data test is not displayed in this paper).So, from the statistic analysis using Pearson correlation test, only 234 respondents are used as a sample data.The coefficient correlation (weight) between each KSF and component of ERP implementation success is shown in the following table.There is no significant correlation between: (1) Clear goal & objective (X1) and service quality (Z3), with ρ = 0.046; (2) Project time (X3) and strategic impact (Y2), with ρ = 0.069; (3) Data analysis & conversion (X19) and strategic impact (Y2), with ρ = 0.125.Whereas, other variables have a significant correlation at 0.01 or 0.05 level.(operational, support, maintenance and monitoring).Each KSF will be involved into every stage of ERP implementation life cycle in accordance with its function.The red color in figure 3 shows the 10 of most critical factors in ERP implementation success.The detail of each stage is explained below.

Project Preparation Stage
At project preparation stage, there are nine KSFs involved, namely: team work, identification of organization maturity level, define clear goal & objective, business process reengineering, project budget & time, top management support, project management, communication and culture readiness.
Team Work--ERP implementation teams should be composed of people who are chosen for their skills, past accomplishments, reputation and flexibility.These people should be entrusted with critical decision making responsibility (Daneva, 2003;Rothenberger, 2010).The team work has up to 49.30% role in determining the success of ERP implementation.
Organization maturity level -the organization maturity level is one of the key success factors in ERP implementation success.The higher maturity level of organization is, the higher possibility success will gain, and the lesser the cost to be incurred.The organization maturity level has up to 25.20% role in determining ERP implementation success.
Clear Goal & Objective--Clear goals and objectives are essential to guide the organization in achieving the successful implementation of ERP.This is intended to achieve the implementation of ERP in accordance with the time and costs determined and in accordance with company business needs.The clear goal & objective has up to 30.70% role in determining the success of ERP implementation.
Business Process Reengineeringbusiness process reengineering is recommended to be done in the process of ERP implementation, in order to gain a competitive advantage for the company.But, it depends on the maturity level of organization and budget & time available.Business process reengineering has up to 44.20% role in determining the success of ERP implementation.
Project Budget & Time -project budget and time are absolute requirement to be met in the process of ERP implementation.Inadequate budget and time will cause a failure of implementation in this system.The project budget has up to 31.50% role in determining the success of ERP implementation, while the project time has up to 21.9%.
Top Management Support--Successful implementations require strong leadership, commitment and participation by top management (Holland & Light, 1999;Lee et al., 2010).They will provide the necessary resources and authorization in order to achieve ERP implementation success (Bhatti, 2005).Management should monitor the project progress and provide clear direction of the project.The top management support has up to 58% role in determining the success of ERP implementation.
Project Management--Successful ERP implementation requires that the organization engage in excellent project management.This includes a clear definition of objectives, development of both a work plan and a resource plan and careful tracking of project progress (Akkermans & Helden, 2002).The project plan should establish aggressive -yet achievable -schedules that instill and maintain a sense of urgency (Laughlin, 1999).The project should identify the modules selected for implementation as well as the affected business processes.If management decides to implement a standardized ERP package without major modifications, this will minimize the need to customize the basic ERP code.This, in turn, will reduce project complexity and help keep the implementation on schedule.The project management has up to 44.70% role in determining the success of ERP implementation.
Communication--Communication is one of the most challenging and difficult tasks in an ERP implementation project.It is considered a critical success component in ERP implementation process.It is important to create an understanding, an agreement on implementation and sharing of information among project teams and to communicate the outcomes and goals across the organization within each stage of implementation (Kim et al, 2005).Communication should start early on ERP implementation project.It can include an overview of the system and reasons for applying it as consistently and sustainably (Bhatti, 2005).It has the most important role (66.40%) in determining the success of ERP implementation.

Culture
Readiness-organizational culture is one of KSFs in ERP implementation.Organization culture that is not ready to accept process change will give negative impact on the ERP implementation.If the culture of the company is not ready for the new technology, resistance on the part of the employees may generate.The culture readiness has up to 47.30% role in determining the success of ERP implementation.

Technology Selection Stage
At technology selection stage, there are five KSFs involved, namely: use of consultant, determine ERP implementation strategy, determine ERP implementation methodology, risk management, technology infrastructure and strong ERP product.
Use of Consultant--The selection of appropriate consultant greatly affects the success of ERP implementation.
A consultant should be used who has a proper knowledge in the industrial field and ERP system that can help the company to develop and implement a system aligning with the company business's need.Many of ERP consultants have no much experience in ERP implementation process.The use of consultant has up to 35.70% role in determining the success of ERP implementation.Leary (2000), ERP implementation strategy can be divided into: clean sheets, customizing and best of bread.There is also a distinguished classification into: big bang, pilot project (by module) and parallel implementation (Davenport, 2000).The ERP implementation strategy has up to 48.60% role in determining the success of ERP implementation.

ERP Implementation Methodology-
There are many ERP implementation methodologies available in the market.However, they lay more emphasis on technical, instead of non-technical issues.In this study, it is found that the ERP implementation methodology has a 52.20% role in determining the success of ERP implementation.Strong ERP Product--Strong ERP product is determined by the product selection process.Normally, before the company chooses one of ERP product, it will do the evaluation of the product.However, a lot of companies implement the ERP system because of the technology driven, instead of business driven.Such drive may cause problems.Therefore, the company needs to choose one of them to support its operational process; or the company can use the best of bread strategy (choose the best module from each product).But, this kind of strategy will give the company another integration problem.The strong ERP product has a 55.40% role in determining the success of ERP implementation.

Project Formulation Stage
At the project formulation stage, there are two KSFs involved, namely: user involvement and change management.
User Involvement--User involvement refers to the psychological state of the individual and is defined as the importance and personal relevance of a system to a user (Bhatti, 2005).It is also defined as a user's participation in the implementation process.The users will be involved in the stage of definition of the company's ERP system needs and also in the implementation of this system.The user involvement has up to 37.30% role in determining the success of ERP implementation.

Change
Management--The existing organizational structure in most companies is not compatible with the structure, tools and types of information provided by ERP systems.ERP system imposes its own logic on a company's strategy, organization and culture.Thus, implementing an ERP system may force the reengineering of key business processes and/or developing new business processes to support the organization's goals (Bernroider & Koch, 2000).The changes may significantly affect the organizational structures, policies, processes and employees (Dezdar & Sulaiman, 2009).If people are not properly prepared for the imminent changes, then denial, resistance and chaos will be unavoidable consequences of the changes created by the implementation.However, if proper change management techniques are utilized, the company should be prepared to embrace the opportunities provided by the new ERP system.The organization must be flexible enough to take full advantage of these opportunities (Chang, 2004).The change management has up to 40.60% role in determining the success of ERP implementation.

Implementation/Development Stage
In implementation/development stage, there are two KSFs involved, namely: user training and data analysis & conversion.
User Training-user training is an important critical success component.ERP implementation requires knowledge to enable people to solve problems on the system.If the employees do not understand how a system works, they will invent their own processes using those parts of the system that they are able to manipulate (Laughlin, 1999).The user training has up to 42.20% role in determining the success of ERP implementation.

Data Analysis & Conversion
That is another important thing in ERP implementation process is data analysis and migration.Many problems arise in this process.Thus, the company prefer 0a different role in ERP implementation success.The role (weight) is determined by using Pearson correlation test.The communication factor has the greatest weight on ERP implementation, with ρ=0.664.Whereas, the smallest weight is a project time with ρ = 0.219.There are five stages in ERP implementation life cycle which are proposed, namely: project preparation, technology selection, project formulation, implementation/development and deployment.At the project preparation stage, the communication is most critical KSF (ρ = 0.664).Whilst, at the technology selection, the strong ERP product (package selection) is most critical KSF (ρ = 0.554).At the project formulation, the change management is most critical KSF (ρ = 0.406).
Whereas, at implementation/development stage, user training is the most critical KSF (ρ = 0.422).This study is expected to improve knowledge in ERP implementation, especially the role of KSF in each stage of ERP implementation life cycle.

Future Study
In line with the findings of this study which finds the priority of KSFs in ERP implementation life cycle, further research need to be conducted in order to test the ERP implementation life cycle through a case study.

Figure 3 .
Figure 3. Priority of Key Success Factors (KSFs) on ERP Implementation Life Cycle (Dantes & Hasibuan, 2011b) Risk Management--Donovan (1999) conducted a Risk Management to identify the preparation for facing the occurrence of undesired events.Each project application of IT brings the essential elements of risk because it is likely that progress will deviate from the plan at some point in the project life cycle.ERP implementation project risk is described as uncertainty or vulnerability that could cause the project to deviate from established plans.Good planning and adoption of a systematic risk management are crucial in project completion on time, and on-budget in compliance with all requirements (Iskanius, 2009).The risk management has up to 41.40% role in determining the success of ERP implementation.Technology Infrastructure--According to Bhatti (2005), an adequate IT infrastructure, hardware and networking are critical to a successful ERP system implementation.It is clear that ERP implementation involves a complex