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Why FIFO: The Benefits of First In, First Out

Christoph Roser — Tue, 04 Oct 2022 11:00:53 +0000

FIFO (first in, first out) is one of the simplest and most basic ideas in manufacturing, and yields significant benefits. It is so simple that I don’t even want to call it a tool, since it is one of the fundamentals in manufacturing (and many other areas). In this post I want to take a ... Read more

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Maintaining Weak FIFO in Parallel FIFO Lanes

Christoph Roser — Tue, 16 Apr 2019 11:00:34 +0000

Sometimes you would like to put more material in a single FIFO lane than the space you have available. In this case you would have to use a combination of two or more parallel FIFO lanes. In my last post I described how to maintain a strict FIFO sequence in parallel lanes. This post looks ... Read more

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Maintaining Strong FIFO in Parallel FIFO Lanes

Christoph Roser — Tue, 09 Apr 2019 11:00:57 +0000

FIFO lanes are a common and easy way to manage material flow. However, sometimes there is not enough space to make a long FIFO lane. In this case the FIFO lane is often split into multiple sub-segments. This post looks at how to maintain strict (or strong) FIFO in such parallel FIFO lanes. Introduction FIFO ... Read more

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Production Sequences: FCFS, EDD, and Others

Christoph Roser — Tue, 26 Feb 2019 11:00:28 +0000

In my last post I looked at delivery sequences like FIFO, LIFO, etc. This second post looks at simple production sequences where you do have to deal with limited production capacity. If you cannot make everything at once, you need a sequence in which you process the parts. Introduction As mentioned in the previous post, ... Read more

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Delivery Sequences: FIFO, LIFO, and Others

Christoph Roser — Tue, 19 Feb 2019 11:00:45 +0000

Sometimes, when you need a part or product from your inventory, you may have more than one item in stock. Which one do you pick? In this blog post I want to present a few strategies for choosing which item to take. The most famous one is FIFO, but there are more options available. In ... Read more

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Top Five Cases When NOT to Use a FiFo

Christoph Roser — Sun, 19 Oct 2014 11:00:05 +0000

Standard wisdom for creating a good material flow is to use FiFo lanes (First in, First out). In other words, the first part that goes into the line should also be the first part that comes back out. As such, FiFo lanes and its big brother, Supermarket, are essential for any lean material flow. However, ... Read more

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The FiFo Calculator – Determining the Size of your Buffers

Christoph Roser — Sun, 14 Sep 2014 11:00:07 +0000

In my previous post, I discussed how to Determine the Size of Your FiFo Lane – The FiFo Formula. My preferred method is still an expert estimate. However, if you are interested in the math, here is a small JavaScript calculator that estimates a FiFo size for two processes. For instructions on how to use ... Read more

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Determining the Size of Your FiFo Lane – The FiFo Formula

Christoph Roser — Sun, 24 Aug 2014 11:00:12 +0000

FiFo lanes are an important tool to establish a pull system. They are often combined with kanban. However, while there is a lot of information on how to calculate the number of kanban (the Kanban Formula), there is very little information available on how large a FiFo should be. In my last post I talked ... Read more

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