![waiting time and blocked time plant simulation waiting time and blocked time plant simulation](https://uh.edu/~lcr3600/simulation/OrderProc.jpg)
The lower Takt time is, the larger the buffer needs to be to prevent being unable to deliver according to customer demand. THE MAXIMUM ALLOWABLE CYCLE TIME is a possible term which can describe the maximum Cycle time the engineers should design in to the system and it is usually set at 92-95% of Takt time ( Duggan, 2002). A defect can occur, or maybe somebody asks the operator something which makes the operator leave his workstation for a few minutes. In designing a Value Stream, it is unwise to design exactly on Takt, but to keep small buffers to be able to compensate for small failures of processes which lead to variance in Cycle Time. The Takt time is the first horizontal line in Illustration 1 and as long as all other times stay below that line, customer demand can be fulfilled. The fact that operators have other tasks to do within the 7.5 hours, for instance attending Team Board meetings or working on Kaizens, is not important for the calculation of Takt. When we take a typical work day in a factory, the available time in Western Europe is 7.5 hours 8 hours of which 30 minutes is a paid lunchbreak. This is a calculated time based on the available production time for a period and the requested number of products in the same period:
![waiting time and blocked time plant simulation waiting time and blocked time plant simulation](https://www.simio.com/academics/student-projects/manufacturing/20140102-When-Simulation-Shows-You-Dont-Make-Changes/img/When-Simulation-Shows-You-Dont-Make-Changes.png)
The TAKT TIME is the rate in which customers request products from the production line. Illustration 1: A visual breakdown from Takt- to Cycle time (source: Panneman, 2017 ) We will first discuss the horizontal lines in the diagram and after that the times in the stock diagram. This chart is called a Yamazumi, which is further described >here<. Illustration 1 shows the different times that should be understood in analyzing and improving the flow of Vale Streams. I personally use the term cycle time as the (average) time between two products coming of the line. There are different definitions of cycle time available in literature. I would like to start off with a warning first. Finally, the most used KPI within Lean will be explained the Lead Time. After that, three forms of Cycle time are described and the difference between Cycle- and Process time. This article will describe a few of the different measures of time used within the Lean philosophy, starting with the time used to calculate whether or not customer demand can be supplied the Takt time. All these times are interconnected ( Panneman, 2017). Within tools like Value Stream Mapping (VSM), Yamazumi and Heijunka, different times are used to help you finding your next improvement opportunity.
![waiting time and blocked time plant simulation waiting time and blocked time plant simulation](https://petrofilm.com/yahoo_site_admin/assets/images/-009nap.115121925_std.jpg)
Lean distinguishes itself form other methods by focusing mainly on time.