Manufacturing Breakthrough Blog
Friday September 11, 2015
Remember in my last posting I gave all of you an assignment to create a Future Reality Tree (FRT) from the list of desirable effects (DEs). So how did you do?
Before I show you my FRT, let’s review the basics of constructing your own FRT. The first step is to make a list of undesirable effects (UDEs) and core problems you might have identified in your Current Reality Tree (CRT). For reference, the figure below is our original CRT. The list we came up with was as follows:
Undesirable Effects and Core Problems from CRT
- Performance metric efficiency is used
- There is no Quality System in place
- Excessive amounts of WIP inventory
- Extended product cycle times cause later customer deliveries
- Throughput rates are too low causing later deliveries
- Repetitive defects are causing excessive repairs & OE
- Excessive repairs drive up operating expenses & delay shipments
- Excessive rework causes higher operating expenses
- Operating expenses are too high
Dettmer  suggests building your FRT by using Post-it Notes, you can use a software such as Visio or Power Point as well. The next step was to transform the UDE’s from the CRT into statements of the desired effects you’re trying to achieve. The following are the UDEs transformed into desirable effects (DEs):
|Performance metric efficiency used at all steps||Efficiency used only at constraint|
|No quality system in place||Quality system in place an functioning|
|Excessive amounts of WIP inventory||Minimal WIP inventory|
|Extended product cycle times||Short product cycle time|
|Throughput rates are too low||Throughput rates are high|
|Repetitive defects||Very few defects are seen|
|Excessive repairs||Very few repairs are required|
|Excessive rework||Very little rework required|
|Operating expenses are too high||OE are at optimum levels|
When transforming UDE’s into DE’s, it’s very important that your wording expresses the desired effect as something truly positive and not neutral in nature. In other words, when someone reads your DE’s, the DE’s should come across immediately as being truly good. The other thing I explained was that when you are wording the DE’s, make sure they are stated in the present tense as though they were already in place. The next step being to arrange the desired effects, you have selected to use horizontally across the top of your paper or white board. And finally, when constructing the FRT you will need to add other ideas (i.e. injections) in order to be able to realize the final desired effect.
Based upon the desirable effects we listed above, the figure below is my Future Reality Tree. There are quite a few steps left to do as recommended by Dettmer , but for our purposes this is how to construct an FRT. For example, we did not look for negative branches and did not build in any positive reinforcing loops, but the essence of the FRT construction has been demonstrated. One thing I did not mention in the earlier posts is the purpose of the elliptical objects within both the CRT and the FRT. These objects are the logical “and” statements, meaning that when two or more arrows pass through the ellipse, then all of the entities must be in place to achieve the upper level entity.
In my next posting we’ll introduce the final two TP Tools, the Prerequisite Tree and the Transition Tree. As always, if you have any questions or comments about any of my posts, leave me a message and I will respond.
Until next time.
 The Logical Thinking Process – H. William Dettmer, Quality Press, 2007