Nov 30 2018
Runners, Repeaters, and Strangers among Components
In assembly operations, we need a Plan For Every Part (PFEP). For each purchased component, we must specify suppliers, choose order and delivery patterns, organize all actions taken inside the plant to deliver it from the receiving dock to the assembly line.
Setting a plan for each one of the thousands of purchased items is a daunting task. It helps if you can group the items in a handful of categories. Policies by category may not be as fine-tuned as for individual items but they are an improvement over “one-size-fits-all.”
To make it easiest to do what you do the most frequently, a natural criterion for categorizing purchased components is frequency of use. Once you have sorted the purchased components by decreasing frequency of use, however, you need to set category boundaries that make sense for assembly.
Rather than using arbitrary cut-offs, we base thresholds on the proportion of the demand that can be built completely as a function of the frequency rank of components. A point on this plot means, for example, that 50% of the demand can be met using only the 100 most frequently used components.
We explain how we use this chart to categorize components as Runners, Repeaters, and Strangers. Then we show how we generate it from bills of materials and a product demand. We end with actual examples from several factories and recommendations on communicating these results.
Nov 17 2019
The Inner Workings of Amazon Fulfillment Centers | Christoph Roser | AllAboutLean
“Recently I had the chance to visit two Amazon Fulfillment Centers to take an in-depth look at their inner workings. While many articles about Amazon go over the basics, I will give you a deep dive into the workings of their fulfillment centers. Due to the amount of information, I divided the content across a series of posts. ”
Sourced through AllAboutLean: Part 1, Part 2, Part 3, Part 4
Michel Baudin‘s comments: Thanks to Christoph for posting this valuable information. At the end of Part 4, he announces more to come, about the software running the fulfillment centers. I look forward to it.
#logistics, #amazon, #robots, #materialshandling
By Michel Baudin • Blog clippings • 1 • Tags: Amazon, Logistics, Materials Handling