Value Focus Paper
Value Stream Mapping
By Hector A. Rodriguez
February 17th, 2009
GM 588, Managing Quality
Professor Doron Zilbershtein
A Quality Focus Paper
Hector A Rodriguez
Keller School of Management
The purpose of this paper is to describe the implementation of Value Stream
Mapping (VSM) as a powerful tool for quality and process improvement. A VSM
workshop will be applied to the value stream, called: “product development” at three GM
engineering centers in South America. As part of the GM global strategy to joint efforts
and share the worldwide knowledge base, in 2003: GM Venezuela, GM Colombia and GM
Ecuador were all integrated as one operation called GM Andean Region. All three countries
have manufacturing facilities, and all three countries have had independent product
engineering operations for many years. These three units were integrated into one business
operation to improve their performance, to increase market share, to speed product
launching, to expand the market offer to satisfy the customer across the region.
One of the biggest challenges of this unification was to standardize processes,
procedures and strategies across different departments in all three countries. We all have
the same CEO for the Andean Region, and each assembly facility had a Chief Operation
Manager. The CEO’s strategic guidelines clearly stated to consolidate the three engineering
centers into one Andean Engineering Center, so resources and efforts from the three
countries were maximize. The objectives of the VSM workshop to this value stream were:
Improve and reduce the time for engineering release , validation and
parts/components approval for production
Standardizing the Andean Engineering operations with those of the corporation, to
be aligned for global programs development.
To improve and standardize the validation plan to have faster product launches
To increase the effectiveness of the engineering value stream from an approximate
30% to a 90%, First Time Quality ( FTQ)
U.S. companies have always been enamored with strategies to reduce waste, create
competitive advantage, increase throughput, and gain market share. Mass production
manufacturing methods have been replaced by results-oriented lean production systems that
focus on waste elimination throughout the enterprise. The concepts, definitions, and
methodologies of lean have been present in American industry for decades. Probably the
most well-known example of lean is Toyota, when it developed its Toyota Production
System (TPS) after World War II. For over 20 years before anyone knew it, Toyota pursued
the TPS primarily to eliminate waste and reduce costs in its production system — it was the
obvious solution to manage the constraints of space, people, and limited resources. But the
reality is that many of the basic concepts of lean have been applied in business for the past
100 years. (Burton & Steven, 2003).
There are five key principles for lean that has been identified: (1) specify value, (2)
create the value stream, (3) flow, (4) pull, and (5) perfection. (Womack & Jones- 2003).
However it is know that only 80% of the companies have tried or say they have
implemented lean practices, while only 20% has really implemented lean as business
philosophy, hence giving substance results to the efforts they are putting to get leaner.
(Burton & Steven, 2003).
Value Stream Mapping ( VSM) is a lean tool, utilized to clear and slim down
process flow in value stream, to eliminate waste in processes to make them faster, more
efficient and effective. VSM is a tool within the Six Sigma philosophy, and as such it
contributes to create leaner processes, hence leaner organizations.
3. LITERATURE REVIEW
Before we understand Value Stream Mapping as tool, we need to explain the most
important concepts within the Lean Thinking : Process, Lean, Value Stream, Waste and
Value Stream Mapping.
Process is as series of steps that must be performed properly in the proper sequence
to create value for a customer. (Womack, 2005). Its been said that the process thinking at
Toyota is “ Brilliant process management is our strategy” , “ We get brilliant results from
average people managing brilliant process”, “ We observe that our competitors often get
average ( or worse) results from brilliant people managing broken processes”. (GM VSM
Coach Clinic, 2005).
Every business is a collection of processes, and every business shares processes
with other business, including customers. So, everyone is aware of the process as it works
today, but there is always a need to seek for a “perfect process”. The perfect process would
be that one in which value is perfectly specified, to support the customer. So, we need to
focus on the process by which value is created (value stream). In the search for a perfect
process, every step needs to be: completely valuable (no muda: Obsession of Ford &
Ohno); perfectly capable (gives a good result every time: the starting point of Six Sigma);
perfectly available (works when it needs to work: the starting point of TPM), exactly
adequate (no bottlenecks: TOC and TPS), and consistently flexible (able to shift rapidly
from one product to the next, and scalable: TPS). Also every step should be connected by:
continuous flow (so that one step leads immediately to the next: A core concern of Henry
Ford, as transformed by TPS) ; noiseless pull (so that steps are only performed at the
need of the customer: A core concern of TPS) and maximal leveling (so that only true
demand is transmitted: A core concern of TPS in the form of heijunka). (Womack, 2005)
Lean deals with the elimination and reduction of many types of non-value added
activities, often referred to as waste. The driving force for waste elimination is improved
customer value and increased profitability in the products and services offered by the
Whether we are from a Six Sigma or TQM or TPM or TOC or BPR or TPS
background, we are all in search of the perfect process. Our differences, including
differences within the TPS community, are how we frame the problem and how we decide
what to do in what order. (That is: We sometimes differ on the best process for achieving
the perfect process!) ( Womack, 2005)
Lean thinking in summary: The right purpose supported by the perfect process
supported by everyone who touches the process. (Womack -2005)
Value Stream is a set of all the specific actions required to bring an specific product (
whether a good or a service, or, increasingly, a combination of the two) through the three
critical management tasks of any business: the problem solving task running from concept
to detailed design and engineering to production launch, the information management task
running from other-taking through detailed scheduling to delivery, and the physical
transformation task proceeding from raw material to finish product in the hand of the
customer (Womack & Jones, 2003)
Many companies usually don’t try to identify the value stream of a product which
always exposes a wide variety of waste or Muda, as called in Japan. The seven types of
waste were identified by Taiichi Ohno as part of the TPS.
Waste is any element of production, processing, or distribution that adds no value to the
final product: waste only adds cost and time.
There have been 7 types of waste (Muda) and two main contributors Mura and Muri
(GM VSM Coach Clinic, 2005) :
Correction/Defects: rework, work done because of errors in the previous process.
Overproduction: making more then is necessary or making things faster than is
necessary, working ahead: the worst form of waste since it causes all other types of
Transportation/Motion: unnecessary people motions, travel, walking, searching
Material Movement: unnecessary handoffs, transfers, filling, distances of material
Waiting: people waiting for machines, information or people. Information waiting
on people or machines
Inventory: information or material waiting in queue
Processing: redundant or unnecessary mental or physical work, work that is giving
the customer more the he/she is willing to pay for
Unevenness (Mura): a flow of information or product processes that are not regular
or constant causing many of the other types of waste, the lack of consistency in
schedules, products and info.
Unreasonableness (Muri) : pushing a machine or people beyond their capabilities
or what is considered reasonable: overburden
In summary a value stream involves all the steps, both value added and non value
added, required to complete a product or service from beginning to end.
Value Stream Mapping is then a visual representation of a value stream; it is more of a
pencil and paper tool, to engage people’s awareness of a system process. Value Stream
Mapping helps people reveal waste and problems within the flow; it also helps establish a
common language to document processes and to integrate the team understanding the
importance and effects of each step in the value stream. Finally, Value Stream Mapping is a
tool that will provide a blueprint for constant improvement and apply waste elimination to
achieve improvement in flow.
So, why is VSM so unique? and what are its benefits? :
Visualizes the process flow from a systems perspective
Focuses on the customer and the customer’s requirements
Includes information flow and product movement linked to process flow
Summarized the timeline as it relates to delivery to the customer-metrics (
process time, waiting time, lead time, first time quality)
Documents performance characteristics of both the Value Stream and the
individual process steps.
Visibility of progress and quality
4. REAL LIFE APPLICATION
VSM WORKSHOP FOR A PRODUCT DEVELOPMENT VALUE STREAM
There is one specific area that has seen the benefits of implementing Value Stream
Mapping, Product Development (PD), by detecting waste and improving factors like time
and effectiveness, bringing products faster and with better quality to the market. The
Product Development Value Stream Mapping (PDVSM) first implemented by Toyota, has
helped look at the PD as a continuing flow. VSM was first implemented in manufacturing,
but when transferred to the PD processes different challenges were present. First in
manufacturing the process is related mainly to product flow, while in PD is about data flow
; timelines are different, in manufacturing second and minutes are important, while in PD
the timeframe is more related to months and weeks ; Manufacturing is mainly focus on
physical and tangible outcomes, while PD is more focus on knowledge work; the flow in
the manufacturing environment is more lineal, while in PD is multidirectional; reason why
PD need more large and diverse group of technical expertise. (Morgan & Liker, 2006) .
Engineering is different from manufacturing. Value may be defined, and will almost
certainly be measured, differently. The value stream consists of flows of information and
knowledge that are less easily tracked than the material flows of the factory. Uncertainties
must be handled and eliminated as part of this process, and hence coupled or iterative
processes may be required. Many engineering processes handle “mixed model lines;” they
work on jobs of varying size and complexity. These factors complicate the job of value
stream mapping. (McManus, 2005).
As part of the academic objective we are going to present a case how VSM was
used to improve the design and engineering processes at one of the GM business units. The
purpose is to demonstrate how VSM aids to reduce time, cost and improve efficiency in the
product development process.
VSM is divided into four different phases: scoping, current state drawing, future
state drawing and planning/implementation. VSM is not an easy tool to implement, a lot of
commitment, training and working hours are necessary to have positive outcomes.
Figure no.1 shows the different steps undertaken in a VSM implementation project.
Determine the Value Stream to be
Current State Understanding how things currently operate.
Drawing This is the foundation for the future state
Designing a lean flow
The goal of mapping !
Implementation Check points 30,60,90 days, validate
Figure no. 1
Scoping: this step consist of idea generation, project selection and validation as a
value stream process. Not all ideas and processes can be evaluated from the VSM
perspective, so the scoping steps helps ensure that the project involves a value stream, a
process with inputs and outputs that involve many steps to complete. A scoping document
needs to be completed before considering implementing a VSM workshop. The scoping
document will lead through the following questions and help form the team (McManus,
Project sponsor: who is wanting and interested to support and improvement of a
relevant process to the organization
Process owner: the leader responsible for the process outcomes.
Workshop coach: a facilitator to lead the different teams through the VSM phases.
Project description and objective ( purpose of VSM), why are we doing the
Expected results/Deliverables – What improvements do we want to achieve?
Root Cause of the problem ( current state), What is causing the issues described in
the project description?
Who is the customer
List of participants: as to who supplies info to the process, who operates the process,
and who is the final customer of the process.
A Leadership panel will need to be setup to evaluate the recommendations and
proposals and also to lead the team throughout the workshop
Data needed for the workshop such as process time, lead time, first time quality,
costs and others. How should we measure this metrics.
One tool utilized to help structure a good scoping is SIPOC: Suppliers, Inputs, Process,
Outputs, Customer. It is a process oriented tool that asks the team to consider the process in
the context of suppliers, who provide inputs in the form of data, knowledge, resources, etc.
Also the SIPOC helps identify certain outputs for which there are customers who have a
variety of expectations, wants, and requirements.
Let’s take a look at the SIPOC for our Product Engineering Project in Figure no.2.
The process suppliers, inputs, process, outputs and customers have been identified as well
as some preliminary issues to attend during the workshop. A preliminary process flow has
been drawn to understand the flow of events and to prepare for the next step of drawing the
current map. Several issues have been detected from the scoping:
Before the process
Project technology transfer delays
Lack of technology to process information
Late definition of option list
Confidentiality and Ownership agreements delays
Inside the process
Later purchase orders
Lack of technical meeting reviews
Customer issues with current process
Later requirements from manufacturing
Limited technology in supplier base
Lack of standardization in engineering processes
Delay in validation of parts and approvals for production
Delays in material part list distribution
Delays in sample for developments.
Figure No. 2
Source: VSM Workshop GMV: Engineering Release, Validation and Part Approval , SIPOC, 2005
Current State: This next step allows defining the current situation, to draw the current map of the
value stream, in order to later discover waste. The current map drawing will permit to visualize the value
stream very easily, it will help document the customer information and needs for every step of the
process. So, question like : who is the customer? What do they need? When do they need it? Will be
easily drawn in this map and will help team members to educate themselves about the value stream.
One important point of the current state is that it will help identify the key processes within the value
stream. In addition, the data attributes need be defined, at least the following criteria should be
Process Time ( P/T ) : time to actually conduct the work of the process step
Waiting Time ( W/T) :
o During the process step: time when the process is not yet complete, but is not being
o Between process steps: time between processes steps when the task is not being worked
Lead Time ( L/T): Process Time + Waiting Time
First Time Quality ( FTQ): the percentage of the time that the task is able to be completed,
accurately, the first time it is worked on.
For the current state, a “value stream walk” will help fill the information for every step of the
processes, it needs to document every step pretending one is at work; documenting and discovering the
items being produce. Also must establish how each process knows what to process next and document
the information flow. After the current state map is drawn, calculate the process time, waiting time, lead
time and first time quality for the value stream under analysis.
In order to draw the current state map we should use the VSM symbols, we implement different
symbols to express process attributes and characteristics that will help us visualize waste, and to correct
potential flow problems. Figure No. 3 shows some of the most common symbols on VSM workshops
and their meaning. (GM VSM Coach Clinic, 2005)
(wait) Waiting Time
Info flow - electronic
Info flow – Conversation (phone)
Agenda Physical Communication/mail
Figure No. 3
For our Product Engineering project we have drawn our current state (figure No. 4) , linking
every step from the beginning: Definition of Vehicle Product Specifications (VDS) to the end: PPPAP.
We have measured our initial metric estimates, and validate them in the current state map. The
estimated results were drawn from the scoping phase, while the current state give us a more precise
understanding of process time, waiting time, lead time and FTQ.
Figure No. 4
Source: VSM Workshop GMV: Engineering Release, validation and Parts Approval. Current Map
Table No. 1 shows the metrics measured and controlled over the implementation of the VSM
workshop. After completing the actual estimate for the current map, we discovered the times were very
similar to what was estimated on the scoping, however the FTQ was higher that expected, but still very
low ; around 40%, which means the value stream under study has an effectiveness of 40% quality the
first time. This indicate we have a lot of opportunity to get rid of waste, and eliminate unnecessary
activities, resources, steps that will help improve the value stream.
It table no. 1 we show the estimates for two different business units, the numbers for the first line
represents the results for Venezuela Engineering Center and the second line for Colombia-Ecuador
Table No. 1
Metric Actual Estimate Actual Estimate on Objective for the Future State Real future state
SPQRC From scoping current state map (90 days alter
Process Time 12M
15M 1W 15M 1W
First Time Quality
M= months, W= weeks, D= days. First line results for GM Venezuela, Second Line results for GM Colombia/Ecuador
Future State: this state will help identify waste and draw a desire map for a leaner value stream.
Once having the current state we need to ask ourselves: what seems to be broken? What problem exists
in the system? This will help us identify waste and get rid of it. The purpose of this state is to develop a
future state map which eliminates the current state problems, which will reflect a lean design and
eliminates waste as well as the underlying problems identify in the current state.
Before stepping into the results of the future state map, let’s review some of the problems discussed on
the Product Engineering project. The following table summarizes some of the problems identified in the
current state map and their root causes, as well as, proposals for solution according to the future map
design. 27 problems in total where identified in the current map and they can be summarized the
following three categories:
Table No. 2
Waste / Problem Identified Root Cause Improvement
Idea / Solution
Engineering release is done in different sites Engineering Centers has different release Standardize the key processes of the
( Col/Ven/Ecu), rework and potential processes Engineering Centers:
problems for assembly occurs. Engineering • Criteria for Part Number release
Change Notifications ( ECN) are not • Creating and Assembly Breakdown
reliable, especially when release by a List loading to the engineering systems
different engineering center from the • Engineering Change Notifications (
assembly plant. ECN) formats and loading
Part Number proliferation ( temporal and No uniformity in part Lumber creation Align with corporative procedures for part
definite numbers) criteria, does not follow the corporation number creation
guidelines and practices for part number
Rework when technical information for Confidentiality and Property agreements, Work confidentiality and property agreements
design release is from other GM Technical License agreements with parallel to the approval of projects (CSO).
Engineering Centers different sources with exclusive designs ( Negotiate technical agreements clause in the
Black boxes, grey boxes designs) contracts, to support and facilitate technological
transfer from suppliers and sources to GM.
The future map in figure No. 5, looks leaner, not as chaotic as the current map, expressing that waste
have been identified and removed.
Figure No. 5
Source: VSM Workshop GMV: Engineering Release, Validation and Part Approval, Future State, 2005
As part of the future state mapping we have redesigned the flow of the process in order to
achieve improvements that will be part of the target future state. The metrics that we have been
measuring in the scoping and current state map, will also be revised according to the future map, and
they will be set as new targets. From our application, in table No. 3 we show our new target values.
Table No. 3
Metric Actual Estimate Actual Estimate on Objective for the Future State Real future state
SPQRC From scoping current state map (90 days alter
Process Time 12M
13 M 2 W
15M 1W 15M 1W
First Time Quality
Look the new process flow has helped plan for better targets. Process time and lead time will be
reduced by almost 3 months. This will permit to launch products faster. Also if we look at the intended
first time quality , the plan is to increment from and average 40% of FTQ to 83% FTQ , eliminating
much of the rework done during engineering designing and validation phases.
After a future map is been developed, a plan needs to be created with specific objectives and
action steps to achieve the future state: Reduce Cost and waste, improve first time quality, simplify and
document the process, standardize the process, improve response time. Finally implement the plan to
achieve the future state.
Implementation: In this last state we need to define the objectives: a new outcome or new
condition that needs to be achieved. So, as a group, need to review the changes to move from current
state to future state. Then need to define the action steps to achieve the objectives. Set SMART targets
(specific, measured, agreed, realistic, timed), for each action step with measurable impact and
scheduling, assigning responsibility for each action step to a workshop participant, assign support and
secure buy in for each objective.
In order to complete the action steps we used a Business Plan Deployment, a scorecard
containing the following:
Goals: supports the attainment of the vision and mission
Objective: the change from the current state to the future state
Method/Action Steps: the task that have to be done to accomplish the change
Responsible: who is responsible for the objective or action step
Target: a measure that will indicate that the objective/Action has been achieved.
Timeline: When the plan begins and when it will be completed
Support: Who must contribute or provide support
Reviews ( control point) : checks to make sure implementation is proceeding as planned and
having the impact intended.
Summarizing the implementation state deliverables will be:
A fully implemented plan which has improved quality, responsiveness, and cost of the Value
A new value stream is the standard
A new Value Stream that has lean principles and elements in the process
A new process has an on-going visual process of monitoring ( performance metrics)
Post- Implementation Activities: after implementation is on going, a set of review dates are
typically scheduled at 30, 60 and 90 days after the workshop. The purpose is to asses the implementation
status to review the objectives and methods to the plan. To identify problems associated with
implementation and ensure plans are in place to address the problems, and review countermeasures for
those items not achieving the desired result. The plan needs to be check monthly, and make notations to
the plan regarding delays, additions, changes.
After the 90 days we validated the results of our new value stream, noticing that results from current
state has change dramatically and improving the process flow in the Product Engineering Release,
Validation and Approval of parts. In table No. 4 we show the 90 days results for our pilot program
GMT900. The process time and lead times for the value stream were 9 months for process time and 14
months for total lead time, the FTQ was raised from and average 40% to an 84%. It is remarkable how
the lead time ( process time + waiting time) for the whole value stream has dramatically decreased from
an estimated 17 months to a 14 months, the value stream is now 3 months faster than the current
situation, this permits to launch faster products to the market. More importantly the results show how a
standardized process for the three GM engineering center was achieved, maximizing efforts and results
to this value stream.
Table No. 4
Metric Actual Estimate Actual Estimate on Objective for the Real future state
SPQRC From scoping current state map Future State (90 days alter
Process Time 12M 2 W
13 M 2 W
15M 1W 15M 1W
First Time Quality
I have been a certified VSM coach for 3 years, and one of the most rewarding aspects of VSM is
to see how this tool allows taking a snapshot of the current situation, and with guidance and leadership
helps identify waste and eliminate it from the value stream. VSM is a powerful tool, that brings
relevancy, a little complicated and time consuming, but worth it. It can be implemented in any field to
detect wasteful activities. It helps draw a complete value stream, integrate and teach all the participants
about their importance in the value chain, how each process affects the next one, and muda interrupts the
flow of work. It is amazing how Japanese corporations like Toyota have been implementing this tool for
years, while US companies improve their usage after 1996, applying many improvements ideas, and
making leaner processes in many manufacturing and product development environment.
VSM is a tool that will aid to integrate teams, to better understand the flow of information and
products, to set common goals to multi disciplinary teams, making the value stream outputs common to
all the stakeholders
On the other hand, VSM is a very complex tool, it requires hours of training and most
importantly commitment from attendees, facilitators and processes owners. Some time is not easy to
introduce this kind of tool to instill a lean philosophy in any organization; it will take hours of training
before the concepts are understood by a large group of leaders, and the benefits it will bring against the
investment of so many working hours. VSM is not a tool to be implemented by consultants or
facilitators alone, it is an inside job; employees must come with their new and leaner ideas, process,
improvements and action plans. Some times, this can be seen as more work instead of time investments,
and some resistance to change is to be expected from teams.
PDVSM, value stream mapping focus to product development , is a tool to improve the product
development process, it helps reduce times of development, to short down design and development
cycles, at detect waste in the engineering process. Engineering process development includes many
trades of information, papers, reports, approvals, interaction between engineers, managers, suppliers,
customers, among other stakeholders. So, potential for waste elimination is always existent in this kind
of administrative work. We saw in our application how VSM helps reduce time of engineering process,
and to improve the quality of work, and most importantly to standardize process among different
engineering centers, confirming that VSM is a very powerful tool in the lean thinking arena; it brings
relevancy to the value streams.
I like this tool so much that I have considered implementing it in my new business as a process
improvement consultant. While creating my new company, VSM will definitely be one of my most
powerful tools to help organizations get leaner, better and faster.
 James P. Womack, Daniel T. Jones – 2003
Lean Thinking: Banish Waste and Create Wealth in Your Corporation
 James M. Morgan, Jeffrey K. Liker – 2006
the Toyota Product Development System: Integrating People, Process, and Technology
 Burton, Terence T.; Boeder, Steven M - 2003.
Lean Extended Enterprise: Moving Beyond the Four Walls to Value Stream Excellence
 Value Stream Mapping: Go Fast ! Coaches GM Clinic, May 2005
 James P Womack 2005
Frontiers of Lean Thinking: Where we are, Where we are going
 Dr. Hugh L. McManus - 2005.
Product Development Value Stream Mapping (PDVSM) Manual -
Lean Advance Initiative , MIT