A Systematic Review on the Strategic Utilization of Information Systems and IT Infrastructure Flexibility

IT infrastructure is a crucial element in any organization across industry. It does not matter which industry are you in, i.e. manufacturing, education, cosmetic, automobile, health and much more required sufficient IT backbone to support these industries day-to-day operation. To remain relevant in their respective market, they need to be competitive with their competitors. It is recommended that the organization fully utilizes their information systems to forecast and measure their product or services offered. In a way, information systems are able to lead the managers or decision makers to maximize their ability, capability, wisely and strategically use information systems in assisting them to direct, evaluate, guide and suggest for better decision making. Therefore, this study attempts to identify the determinants of strategic utilization of information systems. Literally, most researchers identified determinants of any subject matters through literature review processes. The mechanism in capturing determinants over literature review processes varies to one another among researchers. Mainly in this study, the researchers decided to use systematic review as it is one of the best ways for the researchers to dig and evaluate which of the dimensions best suit both dependent variables (DV) and independent variables (IV). In the process of systematic review, five (5) components were involved, such as problem formulation; literature search; data evaluation; data analysis; and interpretation of results. Respective variable findings were drawn using schematic and it led the researchers to decide which dimension is best to represent respective variable.


Introduction
The dependency of Information technology (IT) can be seen in various scopes and functions in an organization in order to support their daily business functions. The organization will always ensure that their IT infrastructure is workable at any time. This is to ensure that there will be no transaction distortions and they will be able to achieve high return on investment (ROI), to some extent, some organizations are willing to spend some amount of money in order to ensure that their IT infrastructure is in tip top condition. IT infrastructure is classified into two (2) The demands of using IT infrastructure force it to be flexible to their user whenever required.
To become flexible, IT infrastructure shall cater for all three (3) concepts mentioned above accordingly. Yearly studies and papers done produced a report on this concept across disciplines. In the beginning studies conducted by Duncan (1995) Jamaludin (1996) was investigating factors that influence the strategic utilization of information resources (SUIR). Thus, both studies introduced dimensions such as product differentiation, cost leadership and growth advantage as part of the concept of the strategic use of IS.
Overall, in this systematic review, the researchers intended to find the following objectives: 1. To structuring the overview of strategic utilization of information systems. 2. To structuring the overview of IT infrastructure flexibility.
The rest of this paper is as follows. Section 2 introduces the research methodology. Section 3 provides the systematic review findings. Section 4 ends the paper with a discussion and conclusion.  (Kobus & Westner, 2015). Table 1 shows the stages of systematic review. The validity of research is described

Literature Retrieval
In the process of searching and retrieving, this study focused on peer-reviewed journals and conferences on selected online databases that have been decided earlier. List of searches focus by online databases is shown in Table 2.  Upon deciding which online databases to use, the researchers set several phrases to use during the searching process. The phrase is based on the theme that reflects the concept of this study. For the journals and conference papers or proceeding papers, the searching was derived not using any solid keywords, combination of keywords and string such AND, OR, "", '-', '+' etc. In this case, the researchers prefer more to use phrases that reflect the topic of the study. For the first (1 st ) and second (2 nd ) iteration, the researchers use phrases that related to the independent variable (IV) while the phase that related to the dependent variable (DV) was during the third (3 rd ) iteration. Thus, the searching was done three (3) iterations with different phases. Below is the list of phrases that researchers used in this study:

Literature Exclusion
In this systematic review searching or query, the researchers do not eliminate the use of abbreviation of certain words such as "IT" for Information Technology and "IS" for Information System and this also had been done by (Kobus & Westner, 2015).All words and abbreviations are used to give a higher probability of getting any closer journal or conference papers or proceeding papers that most matched the searching.
No matter which online databases are used, the same search strategy was applied across these three (3) iterations. Whenever there were no results, another or broader phrase search was used as shown in Table 3. The extensive use of broader keyword is necessary during the searching. After all, any journal or conference papers or proceeding papers were excluded when the researchers found them not relevant for the study. According to (Kobus & Westner, 2015), all these journal or conference papers or proceeding papers can be considered not relevant whenever at least one of the following criteria was applied:

Literature Categorization
After applying the above criteria as in Table  4, leaving 472 journals or conference papers or proceeding papers to proceed with the literature categorization. All relevant and matched journal or conference papers or proceeding papers were kept and managed accordingly. Each group of phase that had been set earlier was used at each online database. Upon filtering and exclusion, each literature was managed and labelled respectively by dedicated folder as illustrated in figure  2 below: The next phase is extracting the key point at each literature. The main purposes are to identify the dimensions of strategic utilization of information systems and the dimensions of IT infrastructure flexibility. In order to capture and identify those dimensions, the researchers follow (Dibbern, Goles, Hirschheim and Jayatilaka, 2004) as also adopted by (Kobus & Westner, 2015) and little enhancement has been made. Originally, the categorization of items is reference theory; research approach; research type; data gathering and data analysis. Field of the literature and country has been add-up with this note taking.

Descriptive Analysis: Selection of Relevant Literature
The search resulted in a total of 472 journals or conference papers or proceeding papers that were extracted for three consecutive months and the breakdown by iteration is shown in Table 5. All this literature is initially in scope for literature review. On top of that, all these literatures were examined and analyzed their relevancy in order to identify the dimensions of strategic utilization of information systems and the dimensions of IT infrastructure flexibility.  Figure 4 and the IV is shown in Table 6 respectively. The results show only some part or most prominent authors and not from

Discussion & Conclusion
The selection of the dimensions for the DV and IV was basically derived from the results of the systematic review conducted. By doing the systematic review, researchers get clearer picture on the evolution of each variable; which field has adapted and adopted the concept; what type of methodology that other researchers did etc.
To understand the whole concepts of the study, researchers need 360 degree view about it. The motivation of the study was captured too through this systematic review.
The hassle in doing systematic review is where the researchers required capturing every single process involved. Moreover, the researchers also shall be able to identify important components or section in articles they read and note it down. This is due to some articles that discussed the dimension in narrative methods while others prefer in schematic way. Currency and relevancy are a part of criteria to look into while choosing those dimensions for the DV and IV at the end. Perhaps, this approach also shall be able to search and identify the reasons behind all "how" and "why" in the study.
The approach or method used here best suits any who will like to undergo quantitative study. It is important to identify first the IV and DV involved between concept where no matter what researchers will like to find out in their study which either to measure the difference, correlation or factors that influence between concept.
Based on the systematic review conducted, the choice of these dependent variables to form the framework is taken from the previous works by (Masrek, Jamaludin & Hashim, 2009;Jamaludin, 1996), which are product/service differentiation; cost leadership and growth advantage. While for the independent variable, this study will measure the dimensions of IT infrastructure flexibility, such as Human,