Used clothing unsuitable for sale in an affluent market may still find a buyer or end-user in another market, such as a student market or a less affluent region of a developing country. In developing countries, such as Zambia, secondhand clothing is sorted, recycled and sometimes redistributed to other nations. Some of the scraps are kept and used to create unique fashions which enable the locals to construct identity. Not only does the trade represent a great source of employment for women as well as men, it also supports other facets of the economy: the merchants buy timber and other materials for their stands, metal hangers to display clothing, and food and drinks for customers. Carriers also find work as they transport the garments from factories to various locations. The secondhand clothing trade is central to the lives of many citizens dwelling in such countries.  A dress agent will often deal with a buyer and seller directly, taking unwanted clothes that still have value, and reselling them in a shop. 
I am working on implementing OEE in one of our machines that makes centertubes for automotive oil filters. The steel is rolled and each part number has specific diameter and length. However, the run-rates vary for each part numbers. I am somewhat able to calculate Takt time for each part number based on the standard run-rate. However, the problem for me is to determine Ideal Cycle Time. The machine can run as fast as 65 PPM for one part number while it runs as slow as 13 PPM for some other part number. In this case, what would be the optimal way to calculate Ideal Cycle Time for each part numbers? As you know, Ideal Cycle time is required to calculate Performance Metric of OEE.