## 4 Innovation of the TPM Methodology Regarding the Division of Preventive Maintenance  
The authors introduce preventive maintenance modification, whose grounds stem from the TPM methodology and its recommendations. Similarly, the TPM methodology was innovated, deployed and verified on the real operation of the ITT company (section of brake pad production) in the Czech Republic. The whole concept of the innovated methodology was implemented only on the production equipment. The main production equipment was presses (17 pieces) and then secondary equipment such as grinders, sanding mechanisms, scorching rays and more. The total number of devices was 97. In order to be able to handle the whole process of implementing the new TPM methodology, we designed and implemented our own Mpoint information system, which played the role of CMMIS in the ITT company. The system was fully implemented throughout the production plant and more than 200 users (operation of production equipment) worked with it. Figure 4: Division of computerised maintenance management information system (CMMIS). The proposed approach is completely unique and the innovative TPM methodology can be implemented in various industrial companies to increase production and maintenance efficiency. For this reason, the results cannot yet be compared with other approaches. However, it has been adapted to rising trends and primary to the implementation of information systems within Industry 4.0 and digitalisation. In this case, we present the proposed innovative way of preventive maintenance division into three logical units, which interconnect their usage, specifically performed activities. The system is controlled and fully implemented using CMMIS. Execution of individual preventive maintenance operations is registered in touch panels and stored in a data warehouse. Planned checks and other functions mentioned below are performed through a web interface in the cloud-web application. Basic division of preventive maintenance into blocks, see Figure 5:  
1. Periodically repeated preventive maintenance--time-driven: AM (autonomous maintenance);
2. Fixing findings--finding-driven: PM (preventive maintenance);
3. Legislative preventive maintenance--legislation-driven: PP (periodic prevention). Downtimes of individual equipment is controlled by block AM, i.e., time-driven, when each piece of production equipment is out of operation after the same periods of time based on its predefined priority. Equipment is thus divided into categories; each category is out of operation for different lengths of time on different days so that workforce and workdays would be distributed effectively. This results in a decrease in redundant preventive maintenance of less utilised equipment as well as in needed workforce capacity. When a machine is out of operation for preventive maintenance, all three blocks are usually executed, although the AM block is the only compulsory one (as it is time-driven and is executed every time the machine is out of operation in the given period according to the priority). The AM block standardised operations are executed, and it is hard-planned. Unlike AM, the PP block is expiration-driven, so it is performed only when the period expires, which can differ from the predefined period; therefore, it is always performed in the last AM block before the final expiry. The PM block is driven by findings on the equipment and is planned only if any finding is registered and needs to be removed. The authors proposed this division  
Figure 5: Division of modified preventive maintenance according to areas. because individual blocks differ in the operations being executed, and it is unnecessary to always execute all blocks. Therefore, the AM block is rather of a check nature, when the equipment is carefully checked, and only assistive TLC (tighten, lubricate and clean) activities are undertaken, which helps keep the equipment operational in a standard mode. This block does not include any extensive repairs or replacements.