Sometimes, existing glass processing systems fail to meet the set requirements of the operator. For example, the lack of quality of the initial products, the susceptibility of the plant components to error or outdated technology are reasons why appropriate measures to improve the situation are becoming ever more urgent. In many cases, complete renewal of the plant is unfeasible, with a high investment requirement expected. Alfred C Beimdick et al report on a successful retrofit of a mirror production system, which has been upgraded to a quasi-as-new system by a sound and competent analysis of the weak points and the subsequent renewal of a few system components. As a result, this project has led to a significant increase in quality and incidentally, noteworthy energy savings.