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Published byDarcy Parker Modified over 7 years ago
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How will you know that a change is an improvement?
The importance of measurement
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Learning Objectives Create a run chart from data collected during a PDSA Cycle. Utilize the four rules to determine if a process has improved. Design a PDSA cycle utilizing the knowledge gained from a previous cycle.
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PDSA Measurement Improvement is about making changes to processes & systems, measurement plays a key role in all improvement efforts. The purpose of measuring is for learning, not for judgment or comparison. Project teams need measures to give them feedback that the changes they are making are having the desired impact.
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Data Documented observations or the results of performing a
measurement process. Provides opportunities to obtain information & knowledge through inquiry, analysis or summarization Strategy is to utilize small samples, just enough to plan the next sequential test of change. Run and Shewhart charts are used to determine if changes yield improvement.
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Improvement vs. Accountability
Data for accountability is collected to assess performance Data for improvement is collected to test a hypothesis Mixing a system designed to collect data for improvement and a system reporting to external sources for accountability create chaos with neither purpose satisfied. If staff suspect data being collected for improvement will be used for accountability, data may be difficult to obtain.
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Family of Measures Health care systems are very complex. Multiple measures are necessary to evaluate the impact of changes on the many facets of the system. Outcome: Focus at the project level & maintained throughout the life of the project (Sepsis-mortality) Process: Are the parts in the system performing as planned. Typically show improvement before the outcome measure does. (Turn around time of order to administration of antibiotics). Balancing: Looks at the system from a different dimension, what happened to the system as we changed our processes. Aids in detecting unintended consequences (Patient Satisfaction)
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Run or Shewhart Charts Because improvements are made over time, in order to facilitate learning and communication, measures should be displayed on run charts Time-ordered charts provide the primary way to assess the impact of each PDSA cycle. Better than Before-and –After, feedback is constant & ongoing Key changes can be annotated on the charts to begin analysis of the impact of the changes.
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Did the process improve?
PDSA
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Seven Steps to Constructing a Run Chart
State the question the run chart will answer Label the horizontal scale (time, each patient….) Label the vertical scale-easy to read. Ample room for future data Plot the data points and connect with the line Title the graph Calculate the median (number in the middle of the data set) Annotate unusual events
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Interpreting Run Charts
In addition to the overall visual analysis, four rules may be used to identify nonrandom signals of change on a run chart: Rule One: A shift- 6 or more points above or below median Rule Two: A trend-5 or more points going up or down Rule Three: Too many or too few runs-series of points in a row on one side of the median 4. Rule Four: Outlier
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Case Study A sepsis task force at hospital X hypnotized that by stocking a broad spectrum antibiotic in the floor pxysis the turn around time from order to antibiotic administration would decrease. They measured for 5 patients and created a run chart. Did the process improve? PDSA
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PDSA P Placing antibiotic in pxysis will decrease order to
administration TAT for abx D Run for 5 patients S Create run chart What happened with patient # 7? A Patient #7 abx not ordered STAT. Corrective action: All sepsis patient abx orders 1st dose now Next Step: Run PDSA with hypothesis abx in pxysis + 1st dose now
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Has the process improved ?
PDSA 1 PDSA 2 Note: It can be misleading to place a trend line on a run Chart if there is no signal of change using the 4 rules
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Shewhart Chart Another term is control chart
Distinguish between common cause or special cause variation Include a center line, upper limit and lower limit (+ 3sd) Enables you to determine process stability, process capability & to select the appropriate improvement strategy.
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Common Cause vs. Special Cause Variation
Common Cause= Those causes that are inherent in the process over time, affect everyone working in the system and affect all outcomes of the system. Special Cause= Those causes that are not part of the system all the time or do not affect everyone, but arise because of specific circumstances. The distinction between common and special causes of variation is fundamental to developing effective improvement strategies.
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Interpreting Shewhart Charts
Rule One: A single point outside the control limits Rule Two: A run of 8 or more points in a row above (or below) the centerline Rule Three: Six consecutive points increasing or decreasing trend. Rule Four: Two out of three consecutive points near a control limit. 5. Rule Five: Fifteen consecutive points close to the centerline.
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Mistakes Mistake 1: To react to an outcome as if it came from a special cause, when actually it came from common causes of variation Mistake 2: To treat an outcome as if it came from common cause of variation, when it actually it came from a special cause.
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Interpreting Control Charts
Manager concludes, “Tough management gets results!” Award given UCL 60 50 40 30 LCL FW Manager regrets giving award No more Mr. Nice Guy! Is the manager responding appropriately to the control chart?
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Interpreting Control Charts – Case Study 1
The Production Manager for a marketing department had a budget of $198,000 per month for the production of sales materials, proposals, and other marketing collateral. Her budget was based on annual expenses over the previous year. This last month, her budget report showed expenses of $205,000. She circled the number on the report, and sent it out to her direct reports with the note, “Why are our expenses going up? Come to our next staff meeting ready to explain why expenses are up, and how you will control them for the rest of the year.” Individuals Chart Of Production Expenses January 1997 To December 1998 a. Should last month’s expenses be of special concern to the Manager? Why? b. Did the Production Manager take the appropriate type of action? c. What should she expect her monthly expenses to be?
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Interpreting Control Charts-Case Study 2
The Call Center keeps track of calls that come in over its telephone line. It wants to use this data to help budget for the new year. If the process is stable, managers can estimate how many calls may be received each day on average. But first they need to know if there are any indications of special causes in the process. Individuals Chart Of Orders Over Phone Line January 30 To February 22 a. Does the data indicate the presence of a special cause, or is the variation all the result of common causes? b. What is the average number of orders they should expect each day? c. What is the maximum number of orders they should expect to receive each day?
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Summary The run chart is the fundamental method to evaluate the impact
of changes tested and ultimately the success of improvement efforts: Display data to make process performance visible Determine whether change resulted in improvement Determine whether you are holding the gain made by the improvement Create a Shewhart graph by adding probability-based interpretive rules (UCL, mean, LCL) allows us to learn whether our process exhibits a non random signal change.
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Team Time For one PDSA cycles:
Take your patient specific data & create a run chart State your hypothesis Does your data violate any of the rules? State your conclusion Design your next PDSA Share your results with the table next to you 15 minutes
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Run Chart Examples
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Phase 1: Nov - Feb Phase 2: Mar Phase 4: May - Current
Baseline Data Collection Phase 2: Mar Creation of Sepsis Algorithm Education Rollout Creation of Algorithm posters Phase 3: Apr Abx placed in Omni cell Hardwiring Team Discussion of Care Plan Creation of Order Set Phase 4: May - Current Creation of PDSA Tool for Real-time Process Review n= n= n= n= n= n= n= n=8
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Super Sirs on Arrival: Door to Antibiotics (Jan – Jun 2012)
Staff Education
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Super Sirs on Arrival: Door to Antibiotics (Jan – Jun 2012)
Staff Education
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