Last month's article examined auditing the start-up after changeover and overcoming the resistance. This month's article, which is the last of the series, continues with how to determine the cost and benefit of reducing setup time - justification of expenditures, return on investment.
Determining Low Cost
It is recommended that the initial improvements to your setup time target those that are low in cost. This will allow you to reduce setup time, get an early payback and later on use the additional income to fund improvements that are more costly. A good definition of low cost is that it pays back in fewer than four months. It is important to the success of your setup time reduction program that you seek low-cost improvements first.
Calculating Return On Investment (ROI)
By providing an easy method to identify the Return On Investment (ROI), you will ensure that every recommendation for expenditure to reduce setup time provides an ROI calculation. If you have a formula in your organization to determine return on investment, that calculation should be provided and used by the improvement team. If one is not available in your organization, Figure 1 provides the formula to calculate ROI. By filling in each blank and doing the associated mathematical calculation, the items that return 30 percent or less are low cost, which means that they will payback in fewer than four months (30 percent of a year).
It is recommended that every purchase request be accompanied by this ROI calculation. Doing so will instill in your employees the need to find improvements that meet your payback requirements. This will keep you from having the automation first mistake. In most cases, low-cost improvements will result in as much as a 60 percent reduction in setup time and are easy to implement.
Key Drivers to Successful Setup Time Reduction
Time and money are key drivers in your continued improvement effort. If you begin working on setup time reduction and see very little improvement, effort will drop off. If you approach this initiative properly, you should expect to have 30 to 60 percent reductions in setup time implemented in fewer than two months. Doing so will demonstrate the importance to the organization. If you focused on low-cost improvements first, you will realize the financial return quickly and avoid the automation first mistake.
Automation First Is a Common Mistake
Many times, when employees understand that you need to reduce setup time, their first inclination is to develop and recommend automation solutions. Typically automation will provide a 15 percent payback. Relying on automation improvements is costly and when compared to the ROI calculation may take years to pay back. Usually in this environment, your setup time improvement fades away due to the cost. Many companies spend large sums of money to automate and still have the same inefficiencies of travel, transporting and tweaking during setup.
Getting the Return On Investment
It is especially important that management ensure that the payback is realized - because without it, this effort will die out. Payback is when you actually get the return on investment you predicted in the ROI calculation. It is recommended that you determine what would increase productivity for your shop and make sure those items are achieved as you reduce setup time. You can use the formula for productivity when determining if the efforts actually provide the payback.
In most moldmaking shops, the return on investment for setup time reduction is generated from increased production time. By doing this you will receive faster invoice payment as a result of shorter leadtime. Increased sales should be generated due to less time spent setting up and more time producing salable product. This all results in higher income. Figure 2 provides the formula for determining the productivity measurement.
This calculation should be done monthly and reported as shown in the graph in Figure 3.
How to Determine If You Are Successful
If productivity is not improved, the effort has failed. There are cases where setup time is reduced, but productivity (output divided by input) remains the same. This cannot be accepted. Reduced setup time must be replaced with more output. Management must put special emphasis on the need to achieve the return on investment as a result of setup time reduction, and that return must be in the form of real income. This actual return on investment is the real measure of your efforts in reducing setup time.
Setup time reduction is an important improvement in our very competitive environment. We hope that this series of articles has provided enough information for your shop to implement setup time reduction. Getting focused, achieving results quickly and continuous improvement are the keys to success. You no longer have to accept setup time in your shop.