Manufacturing process improvement can be tricky!
We all want to improve our manufacturing processes and create added productivity. We use scads of analysis and cost accounting numbers to evaluate our nonproductive processes. Our computer systems keep track of labor hours used versus our standard cost estimates.
We should have made 120 pcs/hour and we only made 85. … So, what gives? How can we simplify the decision-making process for optimization, and direct productivity improvement dollars to the right place?
Let's look at an example of an optimization project requiring smart investment.
Successful Manufacturing Process Improvement
Here’s an sample problem:
Acme Widget Co. has several different product lines of metal formed widgets.
Each product line has several components made at different parts of the plant using different metal forming equipment. For years, the sub-widget U channels have been produced with actual costs far exceeding estimated standard cost.
In fact, just this year, the engineering team increased the standard cost estimate for the sub-widget U channel just so they can be scheduled with the proper amount of labor hours since they always take longer. And of course, widget customers will not accept a price increase due to the U channel’s cost.
Obviously, the U channel is the weak link in the process.
Or … is it?
Cost accounting has targeted the U channel for a long time, and now some capital budget money is available to finally fix this nagging problem.
For $100,000, Acme can buy a U channel machine that will drop the fabrication labor to 60% of standard cost. That’s a no-brainer, since U channel production had always been running at 125% of cost!
The return on investment is easy. Acme makes a lot of U channels. The loser could become a real winner!
So, let’s do it … right?
Symptoms vs. Problem
WRONG! Fixing the U channel problem only solves a local efficiency problem. The critical question is: Will the ability to produce sub-widget U channels more quickly allow Acme to ship more widgets in a given time period?
That's what we really want, isn't it? In fact, having U channels produced more quickly may be a problem. We don't want excess U channel inventory, do we? It may be better to slow down making U channels.
However, if U channel production rates are restricting the amount of widgets shipped per time period, either buy the machine or look to outsource the U channel production to free up capacity on your current machines for other, more specialized widget components.
This is the key: To correctly optimize your processes, you MUST look at your business as a whole.
Focal Point for Optimization
Having a focused point for optimization, improvement, scheduling, and visual controls will make your life a lot easier. Making this focus known throughout your organization will also result in concentrated energy that will payoff in an increase in shippable units per period of time.
Your goal is to accelerate these units over your fixed costs in the shortest amount of time to achieve higher profitability.
Of course, you’re only as fast as your slowest process, and you’re only as strong as your weakest link. That’s the Theory of Constraints, and your constraint is the place to primarily focus your optimization.
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Yet, when it first came into practice, it shook up[...]
Maintaining inventory of what a customer needs for production, and nothing more, is a delicate and complicated balance. As inventory ages, it can depreciate to a level that no longer adds value for the producer. This is especially true in metal forming processes.