Date post: | 21-Oct-2014 |
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2011 Current Reality TreeExamination Of Current Situations
Theory Of ConstraintsTheory Of Constraints
The Author
• Consultant for Agile & Process Improvement
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Sebastian Schneider
Consultant for Agile & Process Improvement• Kugler Maag Cie GmbH• http://www.sebastian-schneider.eu• http://de.slideshare.net/schneseb• http://prezi.com/user/SebastianSchneider/• http://facebook.com/Sebastian.Schneider.eu• https://twitter.com/SeSchneider
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Necessary-Cause-Logic3
Cause A Effect BAssumption
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Battery is emptyThe engine doesn’t startAssumption: The engine does not start because the battery is empty
Nomenclature4
Cause
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Effect
IntermediateEffect
Predicted Effect5
Stove doesn’twork Stove doesn’twork Washing machinedoesn’t work
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No electricityNo electricity
Additional Cause6
Stove doesn’twork Stove doesn’twork
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No electricity No electricity No power cord
Insufficient Cause7
Stove doesn’twork Stove doesn’twork
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No electricity No electricity Electric system
How To Start?
• Define the system for observation
• List all negative symptoms that you observe (UDE)
• Check the tree
• Identify Root Causes
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• Identify Root Causes
• Rework the tree
• Identify “core causes”
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Define The System For Observation
• Define within your group the system you want to observe
• Examples– “Our sales area does not lead to any
sales”– “Our engineering department is not
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– “Our engineering department is not able to document the code”
• “is – is not”
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List all negative symptoms (UDE)
• Group work– Whiteboard– All team members– Brainstorming
• Tips– Write SMART if possible
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– Write SMART if possible• Specific, Measurable, Accepted,
Relevant, Time limited– Write active– Write in present
• Example:– “Currently we sell not the estimated
50.000 products per month”
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Find round about 3-7Undesirable Effectsfor your system
Check I
• UDE‘s– Are they sufficient?– Are they detailed enough?– Do they have all needed information?
• Example:– UDE: “We do not reach our desired
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– UDE: “We do not reach our desired recommendation rate of 70% per training”
– Ask if this is really the root cause, it might be that
• “The participants are not requested to rate the training”
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Check every UDE regarding granularity and root cause
Check II
• New intermediate effects– Look for new elements that are not
UDE’s but add additional useful information to the tree
– In general they are not “good” or “bad”
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• Example:– “The feedback form is available” is a
general statement– It does not state any problem but
helps to understand the logic
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Check if you need andfind intermediate effects
Root Causes
• Check if the root causes are really root causes and have no predecessor
• This causes are either out of your control(preconditions) or can be influenced by you
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Rework
• Do rework with all the stakeholder
• Generate common understanding and committing
• You can use the “5-Why-Method”
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• Check if all UDE’s are really UDE’s, that intermediate effects are really intermediate effects, …
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Core Driver
• Count in- and outputs
• Identify the core driver of your current reality tree
• The core driver are quite similar to the constraint in the ToC.
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constraint in the ToC.
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