mgmt 580 final project: s. batchelder. what’s the problem? spray nozzle on the parts washer is...
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WP INC: SPRAY NOZZLE BLUES
MGMT 580 FINAL PROJECT: S. BATCHELDER
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What’s the problem?
Spray nozzle on the parts washer is clogging Integral part of the manufacturing
process Each part manufactured goes through
washer Creates time delays Only alternative for cleaning parts to
maintain quality system
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The causes could be… Nozzle installed
incorrectly Debris in water causing
clog From water in tank From water fed through
line Buildup from hard water Debris from parts Soap interaction Malfunction in nozzle Mineral deposit
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The Fishbone: Cause & Effect.
CLOGGEDWATERNOZZLE
SOAP PROBLEMS
MACHINE PROBLEMS WATER PROBLEMS
Evaporation causes levelvariation
Water in tank not optimal temperature
Operator Error
Malfunction
No filtersystem
Residue in tankSoap/waterMixture
Flakes
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Mitigate the causes.
Machine problems Operator training Investigate adding
filtration system Audit of parts and
performance
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Mitigate the causes.
Soap and water problems Operator training Revise operational
processes Explore alternative brands
of cleaning solution Temperature control
system Supply fill water to counter
evaporation
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Force Field Analysis 1.
OperatorTraining
DRIVING FORCES
Simple process adjustments
RESTRAINING FORCES
Low costsolution
HigherMorale
Motivation
Inconsistent
Time to implement
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Force Field Analysis 1.
OverhaulMachinery/NewEquipment
DRIVING FORCESBetter
technology (filter, temp control)
RESTRAINING FORCES
Process better, more reliable
Spend money to save money
Expensive
Compatibility
Learning curve
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Force Field Analysis 1.
Fill water/New brand ofcleaningsolution
DRIVING FORCES
Could belower cost
RESTRAINING FORCES
Opportunity for new partnership
Added steps to process
Availability
Additional cost to implement
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Follow up the Force Field. The low cost option is to correct the
temperature control issue OR explore alternatives to cleaning
solution that may dissolve at lower temp
Both would involve an element of incorporating clean fill water to alleviate evaporation
Last resort is new equipment or modifying existing equipment for cost reasons
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Corrective actions could be… Incorporate a fill water
system AND… Operator training
Maintain temperature Use water only to fill after
evaporation Investigate alternate
brand of cleaning solution or adding a filtration option for existing machine
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Corrective Action PlanISSUE SOLUTION TIMEFRAME SUCCESS EVALUATIO
NPERSONRESPONSIBLE
Water temp. not optimal
Train ops to monitor and adjust as needed
2 weeks to reach all operators
Consistent results in temp samples
If success fixes problem, completed.
Ops Supervisors/Manager
Solution used to fill tank when evaporation occurs
Implement clean fill- water solution
After results of item 1 determined
Soap deposits reduced in tank
If success fixes problem, completed.
Above plus facilities.
No filtering system
Explore options to add system
After results of items 1 and 2 determined
Filtering system installed
If success fixes problem, completed.
Operations supervisor, purchasing,controller
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Implementing the CAP… Each action is determined
by success or failure of previous action
Action 1 (training): Document what process is for
achieving and maintaining correct temp range and acceptable variations.
Establish training schedule for all operators to educate
Two weeks should cover all shifts/employees
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Implementing the CAP… Action 2 (clean fill water)
Evaluation and testing of water supply to ensure no negative reaction with cleaning solution
Determine water delivery system and storage methods
Establish guidelines and process on when and how to use the clean fill water
Any additional process changes to include this step in washing parts
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Implementing the CAP… Action 3 (install filter)
Determine if existing machine can be fitted with filter
If so, find cost, installation procedure and downtime expected for machine
Additional training, process steps may be needed
If unable to modify existing machine, explore purchasing new machine
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Follow up. Action 1 (training):
Sample water temp regularly
Compare with instances of nozzle clogging before implementation of action
If action remedies problem, further analysis could be done to determine the exact temp at which the nozzle starts to experience clogging
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Follow up. Action 2 (clean fill water):
Sample water in tank regularly to determine presence of particulate matter
Gather data to further evaluate effects of fill water temp and volume on cleaning solution
Evolve process for water storage and delivery as needed to increase efficiency in process
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Follow up. Action 3 (install filter):
Determine best option for modifying or purchasing new equipment, contact manufacturer of machine
Evaluate efficiency and any changes in initial costs as well as total cost of ownership of this action after implementation
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Conclusion
Action 1 is very low cost, low impact solution to try that has seems to have a high probability of working.
Temp affects both the functionality of the machine as well as the soap used in the solution.
The build up of non-dissolved soap is prime suspect
Training the operators and making small adjustments to operational process could be solution.
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Conclusion
The fill water option is still lower cost, but involves a lot of testing for compatibility and best practices for introducing a new variable to the process.
This solution would also add to the operational process, but could easily be implemented with the proper instruction.
The next step up would be to modify the machine, or take it a step further and replace it.
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Conclusion
Adding a filter could be expensive, so could replacing the machine. Additionally, the time lost and any additional training with new equipment could be taxing. In the long run, it could result in a more efficient process.
A quick search shows that the machine type described could retail for around $8,000. A considerable chunk of money, but not usually a back-breaker.
With a three-tiered action plan, there is no pressure to spend a lot of money right away, the first two options are the easier ones.
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References “Cause & Effect Diagram.” (2014). Retrieved from
http://office.microsoft.com/en-us/templates/cause-and-effect-diagram-TC006082737.aspx
“Force Field Analysis.” (2014). Retrieved from http://www.mindtools.com/pages/article/newTED_06.htm
“Spray aqueous parts washers.” Retrieved from http://www.safety-kleen.com/products-services/parts-cleaning-technologies/aqueous-parts-washer/spray
Summers, D. (2010). Quality/5e. Upper Saddle River, NJ: Prentice Hall.
“Writing an effective corrective action plan.” (2014). Northwestern University Research [online]. Retrieved from http://irb.northwestern.edu/policies/compliance/corrective-action-plan