Friday, April 26, 2013

Focus and Leverage Part 204

In this posting we will discuss negative effects and then complete the creation of our Future Reality Tree.  Before we do, let's look at our last graphic from Focus and Leverage Part 203.



 
Negative Effects

Let’s pursue a possible negative effect branch from DE-6.  Just from the shear nature of the entity it would appear that negative effects could come from this entity. Let’s build and see what happens.
 

 
From DE-6 to DE-25 is a desired effect and is the default of a DBR (synchronized) system that releases jobs based on the drum signal from the constraint. NE-10 and NE-20 start to become negative entities that if they exist in our future could cause our good idea to become a train wreck.  What we need now is an injection to overcome the possibility, or eliminate the entity of “The efficiency measure starts to go down.” 







If we insert a suitable injection we should be able to overcome the negative effects that will result if we don’t insert one.  By inserting a suitable injection we should be able to determine some desirable effects rather than negative effects and re-write the negative entities to become more desirable.
In this case we applied two additional injections to reverse the negative effect (Inj-2 and Inj-3).  Both of these injections came from the original CRD injection list and seemed to work well in the FRT.  The CRD injections are always a good place to look for any additional injections you might need.  However, it is also possible that the injection you seek is not listed.  In that case, ask yourself; “What must exist in order for the negative effect NOT to exist?”  Whatever the answer to that question is can become a possible injection.
Loop
The final diagram also contains a loop (the red line on the left side).  This loop signifies the repeatable action of the entities that can happen over and over again.  In this case the loop states the if, “Production flow will improve” then, “The internal measure changes from “push” to “pull”.”  In other words, if INJ-1 exists and the other entities logically linked to it exist then, the production flow will improve.
Now, we have a plausible FRT if, ALL of these entities and injections can be made to exist in reality. If they do exist it will allow us to overcome the undesirable effects (entities from the CRT) by implementing the injection (idea) that will allow us to turn things around and get Dome heading in the right direction.
Next – The Prerequisite Tree (PRT)
In the next step we will determine “WHY” we can’t have “Production is synchronized to maximize throughput.”  In other words, what obstacles exist that stand in the way of making Inj-1 a reality?  If this injection is really the answer we need then, why can’t we have it today?  What’s stopping us from doing this righ now?  We can only assume that if it were an easy idea to implement, it would have already taken place – but it hasn’t!  The transition from the Future Reality Tree (FRT) to the Prerequisite Tree (PRT) will introduce how to move from “What to change to” to “How to cause the change to happen.”

I want to thank Bruce Nelson for this series of posts on the TOC Thinking Process analysis.  As you're seeing a complete TP Analysis takes time, but the results are worth the effort.
 Bob Sproull

 

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