## 3 The M\({}^{3}\)AIN4 SME Model
### STEP 2: Maintenance Management Information Practices Assessment
#### 3.2.2 The Architecture Model Design  
The architecture of the maintenance execution process, performed through the Architecture, allowed the definition of the maintenance management information infrastructure, composed of a set of databases (DB) (Figure 4):  
1. The equipment DB includes all the documents and information files associated with the equipment and relevant for carrying out the proper maintenance interventions. All the types of documents should be consulted, both to plan a maintenance intervention and to perform the work order. The information files associated with the equipment include the physical and technical documents, failure documents, maintenance documents, and improvement plans.
2. The maintenance personnel DB includes all the documents and systems associated with the maintenance personnel and are relevant for planning and choosing the correct operator for carrying out the intervention. The systems associated with the maintenance personnel include the systems for education and training, and for reward and recognition, in order to monitor the performance and improve the competencies with a specific training programme.
3. The maintenance work order system is composed of two parts: a maintenance work order request and a maintenance work order. The maintenance work request represents the completion (paper, telephone or computer) of a form that contains all the information useful to the planner or the maintenance coordinator in order to schedule the maintenance operation. The request can be made by any person in the organisation. The maintenance work order represents the completion (paper, telephone or computer) of a form containing all the information useful to the maintenance and/or production operator in order to carry out the maintenance work (whether it is an inspection, a preventive or replacement intervention or an emergency). In this way, the request, once planned and scheduled, becomes operational.
4. The maintenance reports system includes elements (data) collected previously for the objects: the equipment, maintenance personnel and work orders.  
The aim is to understand what information exists to define the indicators and to monitor the progress of the maintenance process. The scope is to assess the maturity of each DB, considering several criteria: what and how many documents (information files) linked to each DB are currently available and ready to be consulted; the level of accessibility by users and the quality of each document (HOW); the upgrade period (WHEN); the support tool used for their maintenance and management (WHICH); and if, for each one, there is a specific employee who takes care of its correct management (WHO).  
Not all the criteria are significant for each DB; therefore, for the maintenance work order only, the criteria HOW and WHEN are evaluated. Regarding the aspects included in a work order request and work order, the other criteria (WHEN and WHO) are not significant.  
However, the model developed, to date, covers four DBs: the equipment, maintenance personnel, maintenance work order and maintenance report; therefore, a systematic approach is used to assess the maturity level of each (Figure 4).