50 ISE Magazine | www.iise.org/ISEmagazine
case study
A deeper dive was considered to determine both internal
and external customers. Far too often, teams focus on the
trees and not the whole forest. It was noted that the cus-
tomers of the process included patients, families, regulatory
agencies, county governments, competitors and others.
In simplest of terms, the team noted emergency delays as
the No. 1 driver of patients leaving without treatment and
customer dissatisfiers. Moreover, cultural opportunities,
communication and ED physical layout were cited as causes
of the inefficiencies. Other techniques, such as data analysis
using histograms and control charts, indicated issues with
consistently following an efficient process, which ultimate-
ly led to customer dissatisfiers, LWOTs and lost business.
Improve. To improve the situation, the team engaged
the emergency department’s physician group to complete
an operational assessment related to the department’s flow.
During these activities, it was noted that influences among
people (i.e., culture), place, process and communication
produced an elevated LWOT rate and negative patient ex-
perience. Additionally, the board authority, quality man-
agement system and front-line staff were engaged to gain
buy-in for countermeasures. The focus was on educating
these stakeholders to emphasize the importance and effects
of a reduced LWOT rate for the time period.
After identifying the current conditions and targets, and
engaging our stakeholders, the team started a small-scale
pilot project. During the pilot, the emergency department
was reduced from six treatment rooms to four due to hos-
pitalwide renovations. Staff were trained on the imple-
mentation of direct bedding and triage protocols. After the
staff demonstrated competency and compliance with such
protocols, creating movement throughout the emergency
department was introduced. This included using overflow
and discharge waiting areas to accommodate patients de-
spite the reduction of treatment areas. Staff then demon-
strated mastery of skills and flow processes by moving to a
new area as we progressed in renovation phases.
Finally, the staff moved from a four-bed to a nine-bed
treatment area and demonstrated retention of learned abili-
ties. These changes transformed the process, flow and sub-
sequent KPI scores for over a year post-project.
The team realized significant improvements in both
LWOTs and patient satisfaction post improvements (see
Figure 3, Page 51). LWOTs were reduced by 27%. Test of
hypothesis was used to analyze the results. The team’s hy-
pothesis stated that process changes in the emergency room
throughput would reduce LWOTs and improve patient
satisfaction. The null hypothesis states there is no change
while the alternative hypothesis states improvement was
achieved.
The results revealed that T test (2.67) was greater than 1
Tail T Table (2.46) for the LWOT data analysis. Thus, null
hypothesis was rejected and the alternative hypothesis ac-
cepted. The process improvements reduced LWOTs at the
99% confidence level.
The team also realized a 20% increase in patient satisfac-
tion scores. Test of hypothesis was also used to test the pa-
tient satisfaction data. The null hypothesis states there is no
change while the alternative hypothesis states improvement
was achieved. The results revealed that T test (1.85) was
greater than 1 Tail T Table (1.7). Thus, we reject the null
hypothesis and accept the alternative hypothesis for patient
satisfaction scores. The process improvements increased pa-
tient satisfaction scores at the 95% confidence level.
Control. To control the changes and improvements, the
team focused on internal audits, data tracking and direct
communication techniques. Internal audits, for example,
are conducted monthly with a focus on process noncompli-
FIGURE 2
Project SIPOC
Defining the suppliers, inputs, processes, outputs and customers addressed by the LWOT project.