## 2 Literature Overview
### Maturity Models & Maintenance Management: Gaps and Motivation of the Paper  
The analysed MMMs propose the use of numerous subjective assessment criteria and, as such, may present applicability challenges when used for maintenance maturity measurement [10; 11; 12]. However, the MMMs discussed in the previous section ignore several important aspects for all types of companies, both SMEs and large enterprises, including:  
1. no clear method/framework for deriving the assessment items,
2. the absence of a clear linkage between the maintenance process (especially executive) and assessment items,
3. no improvement programme that supports companies to reach a higher maturity level is included. Moreover, in the existing models, the assessment areas defined are generic (high level), formulated from the literature as maintenance management process key measures, and do not vary in importance depending on the business context; this, potentially, could lead to ambiguous maturity results. This becomes particularly relevant for SMEs, which usually do not have a structured maintenance organisation; therefore, the measurement classes identified could be incoherent within their specific business context. \begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline
**Title** & **Year** & **Scope** & **Development Phases** \\ \hline
**Understanding the Main Phases of Developing a Maturity Assessment Model**[32] & 2005 & This paper proposes a methodology and outlines the main phases of generic model development. The paper applies the model proposed to two advanced maturity models in the domains of Business Process Management and Knowledge Management. & (1)cope (2)Design (3)Populate (4)Test (5)Deploy (6)Maintain \\ \hline
**Developing Maturity Models for IT Management–A Procedure Model and its Application**[24] & 2009 & This paper proposes a procedure model for the development of maturity models. A case study shows the applicability of the model. The results of this paper are used as a manual for methodically well-founded designs and evaluations of maturity models. & (1)Problem definition (2)Comparison of existing maturity models (3)Determination of development strategy (4)Iterative maturity model development (5)Conception of transfer and evaluation \\ \hline
**A method framework for engineering process capability models**[30] & 2009 & This article introduces a Method Framework for Engineering Process Capability Models as an element of a methodology on a Process Capability Profile to drive Process Improvement. & (1)Initial decisions (3)Source analysis (4)Model design (5)Draft model development (6)Draft model validation (7)Model consolidation \\ \hline
**Assessing organisational Capabilities: Reviewing and Guiding the Development of Maturity Grids**[28] & 2009 & This paper presents both a reference point and guidance for developing maturity grids. & (1)Planning (2)Developing (3)Evaluation (4)Maintenance \\ \hline
**The Design of Focus Area Maturity Models**[29] & 2010 & This paper presents a generic method to develop a particular kind of maturity model: the focus area maturity model is particularly well-suited to support incremental development of functional domains, as it depends from the concept of having a limited fixed number of generic maturity levels as used in CMM. Instead, it defines maturity levels, called ‘capabilities’, per focus area within the functional domain. & (1)Soping (3)Design model (4)Instrument development (5)Implementation \& exploitation \\ \hline
**Development of Maturity Models: A Systematic Literature Review**[31] & 2012 & In this paper, a systematic literature review was conducted to discover and analyse the existing methods and recommended practices for developing maturity models. The SLR results have served to propose a method for developing maturity models that are focused on product quality characteristics. & (1)Suting the problem (2)Establishing the goals (3)Developing a plan to perform a new maturity model. \\ \hline \end{tabular}
\end{table}