The study presents the detailed analysis of reliability data of an automated croissant processing line. The line consists of several workstations, each having one or more machines with several failure modes. Failure and repair times are collected at all levels of the hierarchical structure of the line (failure mode, machine workstation and entire line) for a period of 10 months and it was observed that there is a significant difference between nominal and effective processing rate. Then some alternative solutions were analyzed and propose a maintenance policy for increasing the effective processing rate of the line, without raising the cost. It can also be served as a valid data source for researchers who want to model and analyzed real manufacturing systems.