As a company operating in the construction industry, the engineering offices of Rothpletz, Lienhard + Cie AG carry out numerous construction projects all over Switzerland. Larger projects are thereby carried out in engineering consortiums, which act as independent entities and imply the merger of several companies for the purpose of a successful project realization. Due to the involvement of different companies, there exist administrative processes with a high potential for optimization, such as the process of accounting, reporting, and controlling.

First and foremost, a basic theoretical knowledge about process optimization in general was built up through literature review. Based on this knowledge, the existing process of accounting, reporting, and controlling for large projects was analyzed for potential improvement possibilities. Finally, the original process was redesigned in collaboration with the client, ensuring all requirements and expectations were met. To support the new process, a tool using Microsoft Excel was developed and implemented.

The result of this thesis is a completely redesigned accounting, reporting, and controlling process, supported by a self-developed tool. By automating repetitive tasks such as generating project invoices and reports, the process should help to unburden the employees from time-consuming tasks and to use the resources for value-generating activities. Furthermore, the error rate will be minimized, which will result in a leaner process flow and reduced costs. This will help the company Rothpletz, Lienhard + Cie AG in the long term to create added value and reduce waste. Based on the KAIZEN principle, the idea is to continuously improve the process through the implementation of the tool, intensive use, and strict adherence to the process requirements. The result of this work is, therefore, by no means a definitive one. Through teamwork, involving all affected employees, it should serve as a fundamental building block for the pursuit of operational excellence for the client.