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02:47 So let's look at how all these come together.02:42 And the upper ranks are the non-value added time between the steps.
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02:38 added time for each step and centered under the data boxes for that step.02:33 The ladder is drawn as a set of horizontal lines with the lower ranks are the values.02:28 Time ladder is normally shown below the data boxes on the value stream map.02:24 the items that you're measuring, not the worse case or the best case.02:20 When determining the values to use in the time ladder, use the average value for.02:16 Things like moving the item from station to station or correcting an error.02:13 their activity is not value added.02:10 It includes when someone is working with that item but.02:04 It includes time when the item is sitting waiting to be worked on like on night.02:02 a batch that are waiting their turn.01:57 That means if the non-value added time includes all the time spent by items in.01:55 Everything else is none value added.01:48 equipment is actively working on the process item in a way that adds customer.01:44 The value added time is the time spent in the process when the operator or.01:37 categories, either it's value added time or non-value added time.01:33 The time ladder shows the allocation of all process time into one of two.01:28 Another data recording approach found on many Value Stream Maps is the time ladder.01:22 Again, try to have time, resource, and quality elements in your data box.01:19 decide what are the appropriate elements for your process.01:16 If not, work with the organizations black belts to.01:11 Your business may have a standard data box format.01:06 most data boxes will actually have three to eight data elements.01:01 there will be at least one quality based element such as first pass yield.00:57 such as the number of people or units of equipment in that step.00:54 Normally, there will be at least one resource-based element.00:51 such as total time or value-added time.00:47 Now normally, they will have at least one time-based data element.00:42 the data items are consistent within a Value Stream Map.00:39 Which data items are listed change from map to map, but.00:34 will have the same list of data in the same sequence in the box.00:30 Now to make it easy to read the map, every data box on a map.00:25 Each data box contains the measurable data that is associated with that step.00:20 Every step will have a data box located just below the step.00:16 a set of boxes on your value stream map that encloses the data.00:09 by the Value Stream Data Box that is associated with each step.00:06 Your Value String Maps are also characterized.I often make my data boxes with post-it notes when first creating a value stream map.It makes it much easier to analyze in the next phase. It is OK if some of the data elements for some of the steps are “Not applicable.” Still maintain the same data elements in each data box and keep them in the same order.Time data is often available in business systems that collect time stamps when a particular step within the value stream is initiated or completed.Use average data in the data box, not best case or worst case.The addition of the value-added time and non-value added time should be the step "total time". The time ladder visually displays the value-added time and non-value added time for each step by showing the value-added time on the lower rung and the non-value added time on the upper rung for that step. In addition to the data boxes, a time ladder is often included with a VSM. Commonly used quality-based elements are first-pass yield and step up-time. Also, there is normally at least one quality-based element. Some of the more common resource-based elements are the number of people or the size of the batch. There is typically at least one resource-based elements. The most common time-based data elements are value-added time and total time. However, based upon the characteristics on the process, different data elements may be recorded for different processes.Įven then, there is normally at least one time-based element. Each data box is identical in format for a given map. The VSM data box is the data collection and data recording aspect of value stream mapping. To further highlight the importance of value-added time, two items from the data box, value-added time and non-value added time, can also be shown using the time ladder technique. A data box should be placed under each step in the VSM. The Data Box should always be used with the Value Stream Map (VSM). The Value Stream Map Data Box is the technique used to capture and analyze data at each step of the Value Stream Map.