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Value stream mapping is a lean management tool that helps visualize the steps needed to take from product creation to delivering it to the end-customer. As with other business process mapping methods, it helps with introspection (understanding your business better), as well as analysis and process improvement.
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The inputs for a values stream map include all the resources you leverage to produce goods or services. The route you follow consists of value adding steps, as well as their attendant non-value-adding steps. And your map will also follow information flows.
Want a more in-depth explanation on what value stream mapping is? Check out our video: What is Value Stream Mapping?
- The software development value stream mapping flow stages are primarily concerned with cross-team communication. The user requests a feature, product teams design functionality, engineers receive the design and build the software, and the software is shipped to the end user. Value stream management for software can be used to identify points of.
- Edraw value stream mapping software is a mechanism to improve cycle times and productivity by visually separating value-adding from non-value-adding activities. Create a Value Stream Map Value stream maps are a popular way to find waste in a company's processes - steps that do not add value to the end product.
How to Use a Value Stream Map?
As we’ve already mentioned, a value stream map allows you to see a top-down overview of your business processes. Then, you can analyze the process or workflow, identifying wastes and inefficiencies. Typically, here’s a couple of things you’d want to be on the lookout for:
- Delays that hold up the process
- Restraints that limit the process
- Excess inventory that ties up resources unproductively
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While value stream mapping is usually used for manufacturing processes, the same principles can apply to other industries too.
What You Need to Get Started
First up, you need to decide what you want to map. In some businesses, one value stream map can cover just about everything the company does. This is especially true if your company produces a single product.
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If you have a complex mix of products or services, however, then you’d have to draw a separate map for each. With which process you’d start is, of course, up to you. Generally, though, you’d want to start off with the highest value areas.
To actually carry out the mapping, you’d want to gather a small project team consisting of representatives from different departments. They have a first-hand perspective on how things are done, and how well the current system works. You might even figure out several ways to improve the processes without even consulting the value stream map. Next up, you need a facilitator. This could be a senior manager who understands value stream mapping, or you can get an external consultant to help you.
As you work, you will create your map – but be ready to make changes as you go. Someone may just remember a missed step somewhere along the line, and that can change the whole picture.
To actually draw the map, you can use:
- Pen & Paper – the simplest solution, just grab an A3 paper & a pencil and get to work.
- Flowchart Software – dedicated tools used for all sorts of business process mapping.
- Workflow Management Software – custom solutions for managing company workflows. In addition to simple mapping capabilities, you can also keep track of and manage the workflows.
Value Stream Mapping Symbols
Symbols help with your visual overview. They show exactly what kind of step you are dealing with. While you could always come up with your own symbols, it’s usually easier to find an already established style and stick with it.
The symbols are usually pretty intuitive – a simple line drawing of a pair of spectacles, for example, indicates that someone has to “go and see,” while a truck indicates transport.
7 Steps to Value Stream Mapping
Now that you know the basics of value stream mapping, here are the exact steps you’d need to take to carry out the initiative…
Step #1: Decide How Far You Want to Go
Typically, you would start your mapping by indicating a start and end point. This would show where your internal process begins and ends. Some companies, however, prefer to map out the entire value chain. This, of course, has it’s pros and cons – while it does give you a better idea of the whole process, there’s usually not much you can do about any external processes.
Your average value stream map begins with the delivery of materials from direct suppliers and ends with delivery to the customer. Place the icon you have chosen to represent your starting and ending points on the left and right of your map.
If your production processes are complex, you might decide to map each of the value-adding processes in greater detail after completing your overall map. In this case, you would start with the process that allocates the work as “supplier” and the process that receives it as the “client.”
Step #2: Define the Steps
Now determine what processes are involved in order to get from point A to point B.
As a simple example, a nursery producing ornamental plants begins with seed from a supplier and delivers plants to a customer. Intervening steps that add value along the way might include:
- Sowing
- Transplanting
- Growing
- Grading
- Shipping
Step #3: Indicate the Information Flows
One of the advantages of value stream mapping is that it includes information flows. To continue with the example above, our plant nursery needs to place orders for its suppliers and its customers will place orders for delivery. How often is this done and how? Record it on your map.
The teams or individuals responsible for each process that takes the product from input to output also need information. Where does it come from and how is this information passed on? Perhaps our flower grower has a centralized planning department which receives sales information and places orders with the seed supplier. It then uses this info and provides a weekly or monthly schedule for each of the processes.
Add this department in the middle of the sheet between the input and output blocks, draw another block below it to indicate the weekly plan, and draw arrows from the plan to each of the departments it informs.
Step #4: Gather the Critical Data
You now have the basics, and it’s time for an in-depth look at each process. To do so, you need real data and some of your mapping team might have to spend a little time collecting the information you need. Typical points to look at would include:
- The inventory items held for each process
- The cycle time (typically per unit)
- The transfer time
- The number of people needed to perform each step
- A number of products that must be scrapped
- The pack or pallet size that will be used
- The overall batch size that each step handles
Step #5: Add Data and Time Lines to the Map
Once you have all the information, you can start adding it to your map. Draw a table or data box under each process block to do so. If you’ve used historical data, be sure to verify it using the current inputs and outputs for each process.
Indicate the timeline involved in each process beneath your data blocks. This shows the lead time needed to produce products and the actual time spent on producing each unit, pack size, or batch. Don’t be surprised if a product with a lead time of weeks takes just a few hours to produce.
Step #6: Identify the Seven Wastes of Lean
Just creating a value stream map without using it would be a complete waste of time. Now that you have one, it’s time to start looking for the “seven wastes” that could be eating up your profits.
- Transport doesn’t add value to your final product – unless you’re in the transport business! See if you can reduce steps involving transport of materials or information that don’t add value.
- Inventory of inputs and finished products costs you money which could have been earning income elsewhere. The lower your inventory levels can be without stonewalling production, the better it will be.
- Motion costs time and time is money. As an example, our nursery worker has to move her transplanted seedling 10 feet from the potting table to the tractor wagon. That’s wasted time.
- Waiting because there’s a bottleneck in a previous process or sub-process is another clear waste of valuable resources.
- Over-processing can be hard to gauge, but if an item can move from one process to another in an acceptable condition with less input, it should do so.
- Overproduction is an additional pitfall to avoid. Even if your product isn’t perishable, storing it and monitoring it until such time as a customer buys it is clearly a waste.
- Defects mean reworking or scrapping and are clear money-eaters. How can you reduce defects in each step of the process you’ve mapped?
Step #7: Create the Ideal Value Stream Map
You know how things are if you maintain the status quo, but how would you like them to look? Use your team to help you map out an ideal value stream map that eliminates, or at least reduces, all the wastes you spotted when analyzing the results of your value stream mapping exercise.
It’s unlikely you’ll be able to get there in one step, so you can create a series of intermediate future state maps. Your business would aim to reach these milestones at specific dates, and ultimately, they’d reach the goal you identified when you drew up your ideal state map.
What should you do now? Start the mapping process all over again! Few processes are so perfect that there’s no more room for improvement! Your aim is nothing less than operational excellence.
Conclusion
The one drawback of value stream mapping done the old-fashioned way is the time that elapses between report-backs and meetings. For those hoping to slim down process flows fast, this can be frustrating.
There’s also the matter of monitoring the effects of changes you’ve decided to implement. Unforeseen, and possibly unwanted, consequences can flow from new parameters – or people could simply be getting it wrong because they aren’t used to the new work method yet.
The best way to have that fix and speeds things up is adopting the right technology. Tallyfy is a workflow management tool that can help you with process mapping and data gathering. To boot, it can also help enforce your new processes. So, why don’t you give the free demonstration a try?
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Value-stream mapping usually employs standard symbols to represent items and processes, therefore knowledge of these symbols is essential to correctly interpret the production system problems.
Value-stream mapping, also known as 'material- and information-flow mapping'[1], is a lean-management method for analyzing the current state and designing a future state for the series of events that take a product or service from the beginning of the specific process until it reaches the customer. A value stream map is a visual tool that displays all critical steps in a specific process and quantifies easily the time and volume taken at each stage.[2] Value stream maps show the flow of both materials and information as they progress through the process.[3]
Whereas a value stream map represents a core business process that adds value to a material product, a value chain diagram shows an overview of all activities within a company.[4] Other business activities may be represented in 'value stream diagrams' and/or other kinds of diagram that represent business processes that create and use business data.
Purpose of value-stream mapping[edit]
The purpose of value-stream mapping is to identify and remove or reduce 'waste' in value streams, thereby increasing the efficiency of a given value stream. Waste removal is intended to increase productivity by creating leaner operations which in turn make waste and quality problems easier to identify.[5]
Applications[edit]
Value-stream mapping has supporting methods that are often used in Lean environments to analyze and design flows at the system level (across multiple processes).
Although value-stream mapping is often associated with manufacturing, it is also used in logistics, supply chain, service related industries, healthcare,[6][7]software development,[8][9]product development,[10] and administrative and office processes.[11]
Identifying waste[edit]
Types of waste[edit]
Daniel T. Jones (1995) identifies seven commonly accepted types of waste. These terms are updated from Toyota's 1930 operating model 'The Toyota Way' (Toyota Production System, TPS) original nomenclature (muda):[12]
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- Faster-than-necessary pace: creating too much of a good or service that damages production flow, quality, and productivity. Previously referred to as overproduction, and leads to storage and lead time waste.
- Waiting: any time goods are not being transported or worked on.
- Conveyance: the process by which goods are moved around. Previously referred to as transport, and includes double-handling and excessive movement.
- Processing: an overly complex solution for a simple procedure. Previously referred to as inappropriate processing, and includes unsafe production. This typically leads to poor layout and communication, and unnecessary motion.
- Excess Stock: an overabundance of inventory which results in greater lead times, increased difficulty identifying problems, and significant storage costs. Previously referred to as unnecessary inventory.
- Unnecessary motion: ergonomic waste that requires employees to use excess energy such as picking up objects, bending, or stretching. Previously referred to as unnecessary movements, and usually avoidable.
- Correction of mistakes: any cost associated with defects or the resources required to correct them.
Waste removal operations[edit]
Monden (1994) identifies three types of operations:[13]
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- Non-value adding operations (NVA): actions that should be eliminated, such as waiting.
- Necessary but non-value adding (NNVA): actions that are wasteful but necessary under current operating procedures.[12]
- Value-adding (VA): conversion or processing of raw materials via manual labor.[12]
Additional views on waste see Lean_manufacturing.
Using the method[edit]
There are two kinds of value stream maps, current state and future state. The current state value stream map is used to determine what the process currently looks like, the future state value stream map focuses on what the process will ideally look like after process improvements have occurred to the value stream.[14]
The current state value stream map must be created before the future state map and is created by observing the process and tracking the information and material flow.[15] The value stream map is then created using the following symbols:
In a build-to-the-standard form, Shigeo Shingo[16] suggests that the value-adding steps be drawn across the centre of the map and the non–value-adding steps be represented in vertical lines at right angles to the value stream. Thus, the activities become easily separated into the value stream, which is the focus of one type of attention, and the 'waste' steps, another type. He calls the value stream the process and the non-value streams the operations. The thinking here is that the non–value-adding steps are often preparatory or tidying up to the value-adding step and are closely associated with the person or machine/workstation that executes that value-adding step. Therefore, each vertical line is the 'story' of a person or workstation whilst the horizontal line represents the 'story' of the product being created.
Value-stream mapping is a recognised method used as part of Lean Six Sigma methodologies.[17]
Value-stream mapping analyzes both material (artifact) and information flow.[18] The following two resources exemplify the use of VSM in the context of software process improvement in industrial settings:
![Value Stream Mapping Software Free For Mac Value Stream Mapping Software Free For Mac](/uploads/1/2/6/6/126609483/888889452.png)
- 'Artifact analysis': analysis of software artifacts like requirements, use case, change request or defect report through the development process[19]
- 'Information flow analysis': analysis of information flows in the development process[20]
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Associated analysis methods[edit]
Hines and Rich (1997) defined seven value-stream mapping tools.[21] These are:
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- Process activity mapping: the initial step of constructing a map which consists of a study of process flows, waste identification, and business process re-engineering.
- Supply chain response matrix: identifying critical bottlenecks for processes in a simple diagram.
- Production variety funnel: helps draw connections to other industries that may have solutions to existing problems.
- Forrester effect mapping: line graphs showing the customer demand and production, allowing visualisation of supply and demand and potential delays.
- Quality filter mapping: locates product and service defects in the supply chain.
- Decision point analysis: determines inflection points for push-and-pull demand in the supply chain.[22]
- Physical structure mapping: combined model that overviews supply chain from an industry level.[12]
See also[edit]
References[edit]
- ^Manos, Tony (June 2006). 'Value Stream Mapping—an Introduction'(PDF). Quality Progress. American Society for Quality. p. 64 – via University of Washington.
- ^'What is Value Stream Mapping? Definition and Details'. Retrieved 13 November 2019.
- ^Rother, Mike; Shook, John (1999). Learning to See: value-stream mapping to create value and eliminate muda. Brookline, Massachusetts: Lean Enterprise Institute. ISBN0-9667843-0-8.
- ^Rother, Mike; Shook, John (1999). Learning to See: value-stream mapping to create value and eliminate muda. Brookline, Massachusetts: Lean Enterprise Institute. ISBN0-9667843-0-8.
- ^Depository, Book. '34 for Quality : John Bicheno : 9780951382943'. www.bookdepository.com. Retrieved 2018-03-22.
- ^Graban, Mark (2011). Lean Hospitals: Improving Quality, Patient Safety, and Employee Engagement. Boca Raton, Florida: CRC Press. ISBN9781439870433.
- ^Graban, Mark; Swartz, Joseph (2011). Healthcare Kaizen: Engaging Front-Line Staff in Sustainable Continuous Improvements. Boca Raton, Florida: CRC Press. ISBN9781439872963.
- ^Plenert, Gerhard (2011). Lean Management Principles for Information Technology. Boca Raton, Florida: CRC Press. ISBN9781420078602.
- ^Bell, Steven; Orzen, Michael (2010-09-14). Lean IT: Enabling and Sustaining Your Lean Transformation. Boca Raton, Florida: CRC Press. ISBN9781439817568.
- ^Mascitelli, Ronald (2011). Mastering lean product development: a practical, event-driven process for maximizing speed, profits and quality. Northridge, California: Technology Perspectives. ISBN9780966269741.
- ^Keyte, Beau; Locher, Drew (2004). The Complete Lean Enterprise: Value Stream Mapping for Administrative and Office Processes. New York: Productivity Press. ISBN9781563273018.
- ^ abcdHines, Peter; Rich, Nick (1997-01-01). The seven value stream mapping tools. 17.
- ^Toyota Production System - An Integrated Approach to Just-In-Time | Y. Monden | Springer.
- ^Rother, Mike; Shook, John (1999). Learning to See: value-stream mapping to create value and eliminate muda. Brookline, Massachusetts: Lean Enterprise Institute. ISBN0-9667843-0-8.
- ^Ali N.B., Operationalization of lean thinking through value-stream mapping with simulation and FLOW [dissertation]. Karlskrona: Department of Software Engineering, Blekinge Institute of Technology; 2015.
- ^Shingo, Shigeo (1985). A Revolution in Manufacturing: The SMED System. Stamford, Connecticut: Productivity Press. pp. 5. ISBN0915299097.
- ^'Value Stream Mapping' Article Source: http://www.isixsigma.com/index.php?option=com_k2&view=itemlist&layout=category&task=category&id=90&Itemid=222#
- ^Rother, Mike, and John Shook. Learning to see: value stream mapping to add value and eliminate muda. Lean Enterprise Institute, 2003.
- ^Ali NB, Petersen K, Breno Bernard Nicolau de França. Evaluation of simulation-assisted value-stream mapping for software product development: Two industrial cases. Information and Software Technology. 2015;68:45.
- ^Ali NB, Petersen K, Schneider K. FLOW-assisted value-stream mapping in the early phases of large-scale software development. Journal of Systems and Software. 2016;111:213-27.
- ^Rich, Nick; Esain, Ann; Bateman, Nicola (1997). Lean Evolution: Lessons from the Workplace. Cambridge University Press.
- ^Hoekstra, Sjoerd; Romme, Jac (1992). Integral Logistic Structures: Developing Customer-oriented Goods Flow. Industrial Press Inc. ISBN9780831130374.
External links[edit]
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