BOSTON
METROPOLITAN COLLEGE
UNIVERSITY
DEPARTMENT OF ADMINISTRATIVE SCIENCES
AD 605 Operations Management
Laralex Hospital Case Study (Due November 25, 11:59 PM)
Write your report as if you were Blanche. Do not assume that the reader of the report has read the case study
document. Include a cover page with the course name, case study name, the date, and your team member names.
Submit only one Word file (using Blackboard).
In the report, Blanche’s will need to use words that Hazel (and other managers) would understand, and terms
that make sense within a health care facility. That is, she should avoid generic phrasing (e.g., process, defect, etc.)
and focus on processes and data at Laralex Hospital. The report should be concise, clear and complete. Include
answers to the questions below in your report but do not list the questions followed by answers - the report
should flow nicely while addressing these issues. Address the following in your report:
1.
Explain what is wrong with using percentiles to compare hospitals. Give an example (not any examples from
the case or in class – especially no coin flip examples) that illustrates why percentiles are ineffective.
2.
Create and interpret a P Chart for each of the outcomes analyzed in the case (an Excel file with the data is
provided). Interpret each P chart based on the Shewhart interpretation rules. Use the Excel Control Chart
template.
3.
For processes that are stable, compare Laralex’s performance with external benchmarks. Use the Excel
Control Chart template. Assume that a very large group of peer hospitals had the following average
proportions:
a.
Discrepant X-rays - 1.11%
b.
Unscheduled Readmissions - 4.6%
c.
Hospital-Acquired Infections - 0.36%
d. Cesarean Sections - 19.3%
e.
Patients who Leave the ED Prior to Treatment – 3.2%
4.
Explain how a comprehensive process improvement program based on Lean Six Sigma will help with their
accreditation. Use specific examples derived from the case study document.
5.
List and discuss the three most important challenges faced by Blanche when implementing a process
improvement program based on Lean Six Sigma at Laralex Hospital (justify them with specific examples from
the case study document).
BOSTON
UNIVERSITY
METROPOLITAN COLLEGE
DEPARTMENT OF ADMINISTRATIVE SCIENCES
LARALEX HOSPITAL1
Blanche Davis just completed her third year as Director of Quality at Laralex Hospital, a medium-sized notfor-profit facility located in a growing region of the Southeastern United States. Laralex Hospital, a member
of the Southeast Medical Care Group, offers a wide range of services to patients who typically belong to one
of the three major managed care providers in the area. The 260-bed facility includes numerous departments
such as maternity, emergency, cardiac care, diagnostic testing, and medical imaging.
Blanche's primary responsibility is maintaining the Hospital's accreditation status, which the Board of
Directors considers critical to the Hospital’s long-term viability. In order to maintain accreditation, a
hospital must submit to audits, both through written documentation and on-site visits, designed to evaluate
its operations against recognized best practices. Hospitals must also provide the agency with periodic
updates, including routine ongoing performance data. Flexibility exists relative to the procedures used at
individual hospitals to evaluate performance.
Many hospitals use external performance benchmarking systems. These systems are administered by
independent organizations that collect data from participating hospitals, then place each facility into a peer
group of similar facilities, so that a comparison may be made. The organization used by Laralex Hospital
charges $12,500 per year for their service. In addition, Laralex employs another firm that analyzes data from
patient satisfaction surveys. Table 1 includes some of the performance data collected at Laralex Hospital.
Neonatal Mortality Rate
Hospital-Acquired Infections Rate
Surgical Wound Infections Rate
Inpatient Mortality Rate
Diagnostic Testing False Positive Rate
Patient Satisfaction Rate (Based on Surveys)
Cesarean Section Birth Rate
Rate of Patients Who Leave Emergency Department Prior to Service
Rate of Unscheduled Readmissions to the Hospital
Rate of Positive/Negative HIV, Hepatitis and Other Laboratory Results
Biopsy Results (Positive/Negative)
Medication Error Rate
Discrepant X-Ray Report Rate
Rate of Pap Smear Results by Category
Table 1: Selected Performance Measures at Laralex Hospital
Blanche has worked at Laralex Hospital for 24 years, ever since completing her education and becoming a
registered nurse. Having held a variety of professional and administrative positions in the Hospital, she is
well respected for her understanding of all internal operations. One morning as Blanche arrived for work,
she found the most recent quarterly benchmark analysis, which compared the Laralex’s performance data to
its peer group of hospitals. There was also a voice mail message from Hazel Wisely, Vice President of
Quality Assurance and Risk Management. "Blanche, take a look at the latest benchmark report. Our results
1
This case was developed by John Maleyeff and F.C. Kaminsky based on their work in applying quality management
principles in healthcare settings. All references to people and organizations are fictional. © 2020 (Rev) All rights reserved.
Laralex Hospital Case Study
Page 1
for hospital-acquired infections, x-ray report discrepancies, and unscheduled readmissions are way up. I am
especially concerned about the increase in hospital-acquired infections. What's going on?" Blanche opened
the report and found that the rate for hospital-acquired infections (an infection that a patient experiences that
was not present at the time of admission) was 4.5 per 1000 patient-days and the corresponding percentile
ranking (compared to the other hospitals in Laralex's peer group) was 86. This percentile means that the
infection rate at Laralex was higher than 86% of the peer group hospitals.
The hospital-acquired infection rate was highlighted because, in the previous quarter, the infection rate was
only 2.9 per 1000 patient-days and the percentile ranking was 22. Blanche knew that these infections could
be due to many causes within almost any department in the hospital, such as personnel not washing their
hands according to the hospital’s protocol, not properly sterilizing treatment devices, or allowing patients to
move unattended around the hospital, to name a few. The latest benchmarking report also showed similar
results for x-ray discrepancies (a jump from 12 to 68 in percentile ranking) and unscheduled readmissions
(an increase from 32 to 91 in percentile ranking). Blanche knew that x-ray discrepancies could be caused by
patients not being instructed properly, improper use of the x-ray device, or device malfunctions, to name a
few. She also knew that unscheduled readmissions had many potential causes.
These types of requests were not new to Blanche. She generally received them whenever a quarterly report
comparing Laralex with other hospitals was generated. In response to these requests, Blanche would make a
few calls and visit the departments responsible for each performance measure. Typically, the department
manager's first response would be similar to that of Bill Karinsky who managed the x-ray department and
was Blanche's first stop. "As far as I know, we haven't made any changes that would impact discrepancies,
but I'll take a look." If the interaction proceeded in a typical manner, Bill would talk to his technicians and
get back to Blanche with his best guess as to the reason for the increase. In most cases, the data from the next
quarterly performance benchmark report would show an improvement, and the issue would be forgotten.
Two aspects of the benchmarking system have continued to disturbed Blanche. First, the number of requests
to track down reasons for performance problems consumed a significant portion of her time. The frequency
of these requests seems to be unchanged over the last three years. Second, rarely was a definitive root cause
identified. The long-term data appears to indicate no real improvements in the hospital's performance. On
this day, she was too busy to worry about these issues, because she needed to meet with the managers
responsible for the two other performance measures whose percentile rankings had slipped. Then, she was
off to a one-week training program on Six Sigma and she needs to start packing. She also needs to arrange
for a friend to feed her cat and water her garden plants.
One Month Later…
Ever since the Six Sigma training course ended, Blanche could not stop thinking about something said by the
head trainer, Professor Robert Cavanaugh. When recommending procedures for interpreting the meaning of
performance data, Professor Cavanaugh stressed that the outcomes of a process will change, even when the process
remains the same. In fact, as she tended to her garden plants, Blanche had a strange feeling of déjà vu. The
thought passed for a moment, and then she realized that she was thinking about the tomatoes on her 12
plants. In particular, she had 12 plants that were rooted in the same soil. They came from the same seed
packet, they were planted by the same gardener, and they were maintained in the same manner. The plants
are produced tomatoes in essentially equal amounts, both in size and quantity. In addition, the occasional
"bad" tomatoes seemed to occur uniformly across the 12 plants. Yet, individual tomatoes picked from a
plant would exhibit quite significant size variation. As she periodically picked the bad tomatoes from the
plants each Saturday, the number of both good and bad tomatoes picked from an individual plant varied
from Saturday-to-Saturday. Did this mean the outcomes changed (e.g., the size and number of bad
tomatoes) while the process remained the same?
Blanche came to realize that plants were like hospitals and tomatoes were like patients. The 12 plants would
be analogous to 12 hospitals in a peer group that were all managed identically and served similar
populations. Even though the 12 hospitals could be essentially the same, the occurrence of outcomes (such
as hospital-acquired infections) would differ across hospitals over a period (such as one quarter). Professor
Cavanaugh referred to these differences as random variations. Performance data for identical hospitals will
Laralex Hospital Case Study
Page 2
vary both over time within each hospital and from hospital-to-hospital for the same period (just like the
occurrence of bad tomatoes on the 12 plants). If this analogy were accurate, then one hospital's performance
within a group of peers could just as likely be the minimum of the peer group, or the maximum of the peer
group, or any place in the middle. Could this mean that the percentile ranking could vary from zero to 100
with equal likelihood? If so, then a percentile ranking change from 22 to 86 (which occurred for hospitalacquired infections) may mean nothing at all!
Blanche arrived early for work on the following Monday. The first thing she did was make coffee, since she
arrived before any of her support staff and was anxious to get to work exploring the performance data.
Using her limited database management skill, she accessed the raw data for hospital-acquired infections over
the past two years. For reporting purposes, the data had been recorded using monthly time intervals and
then summarized by quarter. To save time, Blanche used the monthly performance values. She quickly
downloaded the data (number of infections and number of patient-days by month, typically around 5,000)
and calculated each month’s infection rate over the 2-year period. After choosing the time series graph
option and clicking the OK button, she knew her hunch was confirmed. The “run chart” she created is
shown in Figure 1.
Hospital Acquired Infections
0.0055
Proportion
0.0050
0.0045
0.0040
0.0035
0.0030
0.0025
0.0020
2
4
6
8
10
12
14
Month
16
18
20
22
24
Figure 1: Run Chart for Hospital-Acquired Infections
Blanche recognized the pattern shown on the run chart for hospital-acquired infections. The graph was
similar to many examples she saw during her Six Sigma training – it appeared to be a display of random
variation. She noticed that the run chart showed an average infection rate of about 0.4% (4 infections per
1000 patient-days) with monthly values varying around this constant average. In fact, for a given month, it
looked as though one could anticipate the rate to vary from about 2 per 1000 to about 6 per 1000. Could she
be looking at a process that is unchanged, with the data changing merely due to random variation? Or, was
the likelihood of an infection actually changing in the hospital over that period? Blanche left for a midmorning staff meeting.
On Tuesday, Blanche accessed the database containing performance data over the last two years. She
created run charts for five performance outcomes, including the three outcomes that she was asked about
last month. Figures 2-5 contain the run charts for the proportion of births having a Cesarean Section (CSection) procedure, the proportion of discrepant x-ray reports, the proportion of unscheduled readmissions
to the hospital, and the proportion of patients who left the emergency department (ED) prior to treatment. It
seemed to Blanche that random patterns of variation existed for all but two of the performance outcomes. In
the case of C-Section births (Figure 2), there appeared to be a change in the process (the proportions seemed
to drop suddenly, then maintain a consistent level). In the case of patients who left the ED prior to treatment
(Figure 5), there appeared to be a steady increase over time. Neither of these outcomes had previously been
highlighted using the peer group comparisons based on percentiles. The other outcomes, including hospitalacquired infections, seem to show random variation with no process changes.
Laralex Hospital Case Study
Page 3
C-Section Births
0.300
0.275
Proportion
0.250
0.225
0.200
0.175
0.150
2
4
6
8
10
12
Month
14
16
18
20
22
24
20
22
24
22
24
Figure 2: Run Chart for C-Sections
Discrepant X-rays
0.0225
0.0200
Proportion
0.0175
0.0150
0.0125
0.0100
0.0075
0.0050
2
4
6
8
10
12
14
Month
16
18
Figure 3: Run Chart for Discrepant X-rays
Unscheduled Readmissions
0.05
Proportion
0.04
0.03
0.02
0.01
2
4
6
8
10
12
14
Month
16
18
20
Figure 4: Run Chart for Unscheduled Readmissions
Laralex Hospital Case Study
Page 4
Left ED Prior to Treatment
0.035
Proportion
0.030
0.025
0.020
0.015
0.010
2
4
6
8
10
12
Month
14
16
18
20
22
24
Figure 5: Run Chart for Patients Leaving the ED Prior to Treatment
Blanche took a walk. Her first destination was the maternity department. Before she could say a word, the
head nurse, Robin Gallagher, who was never happy to see Blanche, began to provide a long list of reasons
why her C-Section numbers were bad. They included physicians scheduling the procedures in order to take
vacations, improper pre-natal care, or flu outbreaks potentially affecting pregnancies, among others.
However, this visit was different. After Blanche showed her the run chart for C-Sections, the Robin
immediately stated, "Sure, that's when Dr. Forster left. Some of us thought that he was using the C-Section
procedure even in cases where the other doctors would not." Blanche was thrilled because, finally, she
received a seemingly valid reason from the usually uncooperative Robin.
Blanche also visited the emergency department. After viewing the run chart of patients who left the ED
prior to treatment, the ED staff manager explained that the chart confirmed his impression that service in the
ED had gradually declined due to both an increase in patient demand as well as a decrease in the ED budget.
He had previously attempted to have his budget increased but was told that the performance benchmark
analysis never indicated a problem. He asked Blanche for a copy of the run chart for his use in justifying
future requests. At this point, Blanche realized how much time she had likely wasted over the last three
years tracking down problems that did not exist, and the lost opportunity to highlight real problems that the
current quality system was not able to identify.
Back in her office, Blanche reviewed the materials presented in the Six Sigma training program. Although
run charts can be effective at determining if a process has changed, statistical control charts provide a more
statistically sophisticated method. Although the details were not fresh in her mind, she did understand the
use of control charts during the training course. She plans to review the coverage of control charts and the
method presented for using statistical confidence intervals to determine if the outcomes of a process are
consistent with external benchmarks. In the meantime, she had some internal challenges to overcome.
Six Months Later…
Blanche Davis was able to convince Hazel Wisely and the leadership of Laralex that implementing a processoriented approach to analyzing quality-related data was consistent with accreditation requirements and
positioned the Hospital well with insurers, government regulators, and other key stakeholders. In fact, one
large insurer recently expressed concern to Laralex President Ingrid Carney about the similarity in quality
between accredited and non-accredited hospitals. This insurer may be instituting internal standards against
which to evaluate hospitals based specifically on their ability to improve over time. Ingrid knows that, by
creating an effective system now, these standards may in fact be based on the system implemented at
Laralex. This result would be a huge competitive advantage for the Hospital.
Blanche is given responsibility for organizing the new quality system, which will include the use of P Charts
and other statistical process control methods. It would monitor performance over time and provide a
statistically valid mechanism for comparison with peer hospitals. The new system would satisfy Joint
Laralex Hospital Case Study
Page 5
Commission requirements that performance metrics be evaluated both internally (against prior performance)
and externally (against suitable benchmarks). Its forward-looking approach that reacts quickly to unstable
processes also satisfies the requirement that performance data is used to initiate action to find root causes of
problems.
Blanche will also oversee the implementation of a process improvement system based on the aspects of Lean
Six Sigma that make sense within the Hospital’s environment. Laralex is unique because of its mix of
technically sophisticated medical staff and non-technical support staff. However, its technically oriented
staff (physicians, physiatrists, registered nurses, and medical imaging technicians) do not possess a strong
background in statistics. The hospital’s support functions (accounting, human relations, information
technology, purchasing, etc.) includes intelligent employees but many of whom are not mathematically
oriented.
Blanche’s main worry is that the culture within the Hospital may be inconsistent with the culture needed to
implement an effective process improvement program. At a recent management seminar, she heard the
phrase culture eats strategy for breakfast. She would be prepared to speak with leadership about necessary
modifications to their organizational infrastructure, but she does not know how to approach this aspect of
the implementation. She is especially concerned about the nurses, who are represented by a regional nurses
union, the Amalgamated Nurse and Midwife Union (ANMU), which recently had contentious relationship
with the Hospital during the recent round of contract negotiations. In the past, the ANMU did cooperate
with hospital leadership regarding working rules, but only if it was confident that the changes also
benefitted the nursing staff.
Blanche remembers a recent study performed by her staff showing that the rate of prescription errors was 2.8
per 100 prescriptions. Although most of these errors were minor (e.g., the date was not entered), this error
rate was a surprise to the Hospital’s leadership. As a result, the pharmacy manager was fired. Blanche
knows that, with a healthy process improvement program, all workers will need to report mistakes and close
calls, even if they personally made or almost made the mistake. For example, she wonders if nurses will
report these situations because they are often the last step in a complicated medication administration
process, and the last step is often blamed for problems.
She is also concerned that outside stakeholders may not understand that reporting problems in no way
implies that the Hospital’s operations are problematic. In fact, the U.S. Federal Aviation Administration
operates a voluntary system for tabulating and reporting mistakes and close calls based on information
provided by pilots, air traffic controllers, flight attendants, and other airline workers and contractors. Those
reporting incidents can do so anonymously and the reporter is immune from punishment. The success of
this system is evidenced by the impressive safety record of major U.S. airlines. Other industries, especially
healthcare, have taken strives to create similar systems. But, other leaders within the healthcare community
believe that the culture of litigation in the U.S. will prevent hospitals from willingly exposing its problems.
Laralex Hospital Case Study
Page 6
Laralex Case Study Data
Hospital Acquired
Infections
Cesarean
Section
Procedures
Discrepant X-Rays
Unscheduled
Readmissions
Patients Who
Leave the ED Prior
to Treatment
Month
Patient-Days
No.
Births
No.
Patients
No.
Patients
No.
Patients
No.
1
5225
22
119
32
488
8
310
6
604
6
2
5515
20
111
27
573
3
294
5
575
10
3
5872
15
111
32
489
6
337
14
593
7
4
5398
22
125
28
420
4
253
10
641
6
5
5017
26
99
27
503
6
293
10
601
11
6
5273
17
127
27
580
7
300
4
649
9
7
4824
20
121
25
419
8
319
10
658
11
8
5340
21
117
32
442
4
199
7
552
11
9
5307
14
133
30
407
3
263
11
536
9
10
5507
20
106
23
553
9
259
5
554
11
11
4189
22
120
27
466
3
285
14
708
11
12
4378
17
123
33
551
4
275
11
547
12
13
4620
20
114
29
485
10
320
13
589
16
14
5869
27
128
19
427
7
329
12
596
12
15
4975
21
117
19
540
9
243
11
685
18
16
4969
19
115
21
568
3
278
8
640
15
17
5792
17
104
22
531
9
365
6
659
17
18
4939
22
128
20
558
5
348
11
609
16
19
5616
16
120
24
474
4
290
8
438
14
20
5061
11
121
25
594
9
321
7
522
13
21
5262
20
102
21
540
2
253
9
574
16
22
4808
26
107
18
553
9
266
10
539
18
23
5280
20
118
24
556
11
301
11
634
21
24
5491
24
116
22
541
7
348
9
610
22
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