Jul 3 2012
A Video Showing Office 5S Gone Wrong
See on Scoop.it – lean manufacturing
Not fresh news, but my colleague Maria Samsonova just pointed it out to me.
See on www.leanblog.org
Blog clippings
Jun 18 2012
Art Smalley: Standardized Confusion » The Lean Edge
See on Scoop.it – lean manufacturing
Another substantive contribution from Art Smalley, this time about standards.
See on theleanedge.org
Jun 5 2012
Lean Thinking: Why Are Learning Organizations So Scarce?
See on Scoop.it – lean manufacturing
From Pascal Dennis, brief and to the point, as usual.
See on leanpathways.blogspot.fr
May 21 2012
The OSKKK Methodology
See on Scoop.it – lean manufacturing
The author of this PDF document, Greg Lane, “learned this simple method while working for Toyota. There is nothing profound in these simple ideas…”
OSKKK stands for the following:
- Observe
- Standardize materials, motions, tasks and management.
- Kaizen 1 – Improve information and materials flow and process
- Kaizen 2 – Improve equipment
- Kaizen 3 – Improve layout
See on www.jobshoplean.org
May 13 2012
Lean and ISO-9000: Strange Bedfellows
See on Scoop.it – lean manufacturing
This article is a critical review of a book called Lean Startup that I haven’t read yet and won’t comment about. The review itself, however, contains some surprising statements, about, for example, ISO-9000 being a technique that emerged as part of Lean, or a about Lean being “a system designed to produce a million identical, high-quality Corollas, Camrys, and Siennas.”
I am used to thinking of ISO-9000 as the product of an international body that is unrelated to Lean, and whose implementation is centered on compliance with generic procedures rather than effectiveness. Not exactly the Lean approach to quality.
The reviewer also appears to be confusing Lean with the system developed by Ford for Model Ts 100 years ago. Lean actually includes approaches to production for Low-Volume/High-Mix as well as High-Volume/Low-Mix environments.
See on www.human-habits.com
Jul 5 2012
Yet another (wrong) definition of takt time
This is from a blog post published today that claims to clarify what a takt time is:
Writing a definition for a thing or an idea is tricky. Following Aristotle, I would say that you have done a good job if you have described what kind of a thing it is and how it differs from other things of the same kind, using terms your reader already understands.
In this definition, takt time is described as a “rate of time.” If there were such a thing as a rate of time, in what units would it be expressed? In production, a rate is expressed, for example, in pieces per hour; a time, in minutes or seconds. Takt Time, as its name suggests is a time, not a rate, and certainly not a rate of time, whatever that may be.
This definition then relates takt time exclusively to “a product or service [..] being purchased,” and gives the example of a Nissan being bought every minute in the world, suggesting that 1 minute is the takt time of a Nissan. Incidentally, if this figure were true, Nissan would sell about 500,000 cars/year, versus the 4 million it actually sells.
Takt time, as we use it in manufacturing and industrial engineering, is in fact not a parameter associated with just a product but with a production line making this product. Given the demand that is given to it and the amount of time that it actually works, the takt time of this production line for this product is the time that must elapse between two consecutive unit completions.
If a line is expected to produce 400 units of a product in a 400-minute shift, then, if you stand by the last station of the line, you will see one unit come out every minute, meaning that its takt time is 1 minute. If you switch from working 1 shift/day to 2 to meet the same demand, you double the takt time to 2 minutes.
This is why it is calculated as follows:
It has a numerator and a denominator, and both matter. They are obviously calculated for the same time period.
Share this:
Like this:
By Michel Baudin • Blog clippings • 0 • Tags: industrial engineering, Manufacturing engineering, Takt time