reinertsen theories on product development flow
reinertsen theories on product development flow
Each section has numbered principles, and there are 175 in all. What will this do? As importance grows, such test packages get even higher priority. Because each principle is labeled with the type and a sequence number, the book is easy to use as a reference. The reason for this can be represented in the graph below: Here we see two opposing metrics: transaction cost and holding cost. We can only know if this is a good trade-off if we quantify both the value of the cycle time and the economic benefit of reduced variability. This explains why today's product developers assume that efficiency is desirable, and that inefficiency is an undesirable form of waste. (For an introduction to the topic, I still recommend Reinertsens book. He prescribes controlling capacity utilization as the best way to manage queue size. That is often a bad trade (although, as I'm sure Reinertsen would hasten to add, not always!). Let me close with an excerpt of Reinertsen at his best, using an unexpected example to illustrate the power of fast feedback to make learning more efficient: It should be obvious that fast feedback improves the speed of learning. Team New Zealand designed the yacht that won the America's Cup. Anyone familiar with Lean thinking understands the importance of queues. Hence the need for partitioning our resources into a separateproblem team and solution team. As we already know, congestion for product developers means bigger queues, higher capacity utilization, delays and higher costs. The chapter concludes with a discussion of resource management. Celeritas Publishing, 2009. They can also assess when it is appropriate to engage leadership. Lean Product Development: Where in the world should you begin? If we showed the Toyota Production System to an Internet protocol engineer, it is likely that he would remark, "That is a tail-dropping FIFO queue. Technical Debt: Adding Math to the Metaphor - R SKMurphy, Inc. For example, many startups would do better by removing buffers from their schedules, embracing the variability of their delivery times, and reducing their cycle times. Or consider principle B9: The Batch Size Death Spiral Principle: Large batches lead to even larger batches: The damage done by large batches can become regenerative when a large batch project starts to acquire a life of its own. Here we see two different projects in which the same variables have different economic impacts. It's wonderful to have an author take these sorts of questions seriously, instead of issuing yet another polemic. It is what they refer to as the ramp meter.. Reinertsen has a visceral anger about all that waste, and his stories are crackling with disdain for the people who manage such systems - especially when their actions are motivated by intuition, voodoo, or blindness. Small batches (or short iterations) provide fast feedback (more on this later), but they also have the effect of reducing queue size. 0000002588 00000 n Fast feedback provides a reinforcing cycle that keeps our inventory of design variations low. He points out that we often use surrogate (or proxy) measurements that offer little or no economic connection with the marketplace. Approximating this point nets you optimal economic advantage without extreme accuracy. Ill give you time to start reading either of Don Reinertsens books and will cover these other two topics in my next post. 11. Despite the fact that much of the content has been covered by other texts on Lean and Agile development, Reinertsen brings a rigor to these practices that is often missing from other offerings. No self-respecting Lean approach to product development would be complete without discussing batch size. Vi er specialiseret i SAFe,(Scaled Agile Framework) og erSPCT Gold partner hos Scaled Agile, Inc. 0000003091 00000 n For example, large test packages bundle many tests together and grow in importance with increasing size. Even though Lean and Agile are fairly new topics in terms of hardware product development methods, there are already dozens of books on the subject. The R&D factory isnt creating a product, its creating knowledge, which comes from information that is understood. It is common that we must invest in creating a superior development environment in order to extract the smaller signals that come with fast feedback. I would like to provide some additional details here, but I will refrain in order to keep this review to a manageable length. Armed with that information, we can make rational trade-offs. After all, when upper management has been told a project will succeed for 4 years, it is very hard for anyone in middle management to stand up and reverse this forecast Our problems grow even bigger when a large project attains the status of the project that cannot afford to fail. How high? There is also a very interesting section of this chapter that discusses how to sequence work. 0000000589 00000 n Have you had trouble buying a new piece of test equipment? One of the great additions to the lexicon of product development comes from the notion of quantifying factors that those of us in product development often treat as soft measurements. Hopefully by now youre convinced that some form of Lean or Agile product development process is worth pursuing. If we can apply economic principles to the value of features, we can quantify the benefit of continued development and properly assess whether additional features make economic sense. [This book] will explain why large queues form when processes with variability are operated at high levels of capacity utilization. He shows how the actions of people inside traditional systems are motivated by their rational assessment of their own economics. With so many options to choose from, its no wonder theres confusion. "For those who hunger for a rigorous approach to managing product development, Donald Reinertsen's book is epic. Reinertsen does not speak about startups specifically - his book is meant to speak broadly to product development teams across industries and sectors. If its a really good book it will have ideas in it that Ill want to find later, so Ill mark those pages with a piece of sticky note. Today's developers incorrectly try to maximize efficiency Any subprocess within product development can be viewed in economic terms. Myths are busted on practically every page, even myths that are associated with lean/agile. Well, heres a partial list of topics you can choose from. BestBrains Academy er lokaliseret i Kbenhavn og udbyder bdeagile bne IT-kurser, svel som inhouse kurser og skrddersyede workshops til din organisation. Weve created a space, which is designed to meet the high expectations from our driven, creative trainers and consultants, and for you to feel comfortable, almost like home. Lean product development can be looked at as flow-based product development. After all, they want to do everything in their power to eliminate all excuses for failure. Attendees should bring a calculator, since the course will involve some light calculations. I have become a skeptic of concepts and practices that are not measurable and Reinertsen dives right in with this chapter about ascribing economic value to the work we do as product developers. It focuses on proven leverage points and specific practical methods that have helped participants achieve as much as a 90 % reduction in cycle time. Good for economically minded people (CFO, CEO, etc. All things being equal, it is best to do the smallest jobs first in order to reduce the cost of delay. First, how big are our queues? Sound familiar? It's refreshing to see ideas from these different domains brought together in a coherent way: If we limit ourselves to the relatively simple WIP [work-in-progress] constraints used in lean manufacturing, we will underexploit the power of WIP constraints. Lean Product Development the Opportunity of the Century. Here again, we see the use of a more quantitative approach to evaluating this feedback and defining the right metrics to target economic indicators of performance. Clearly, there comes a point at which additional features cost more than the benefit that is derived from them. Learn how to manage and orchestrate development projects following advanced Lean principles. Failure to correctly quantify economics. This is not to say that we should spend extensive effort on computing economic value to the last dime. In the previous two blogs I made a compelling case for Lean Product Development being the business opportunity of the century, and then gave an example of how and why we focused on the wrong end of the value chain. We often think of product development backlogs as free. Because we are constantly correcting our course, refactoring prior efforts that turn out to be bad deviations are kept small enough to be much less costly than the deviations that come from longer feedback cycles. So, the set points have been adjusted to match the sensitivity of each variable. Even in an organization in which product developers are building tools for internal consumption, there are clear economic drivers that can guide us in good decisionmaking. Throughout the book, this is a recurring theme. A number of tactics for controlling WIP are put forth. Initial attempts to apply lean methods in product development simply copied behaviours that worked in manufacturing. Reinertsen's book shares 175 principles of product development that challenge all conventional wisdom of how software products are built. Let's take a look at each of the eight categories in brief. trailer << /Size 232 /Info 214 0 R /Encrypt 223 0 R /Root 222 0 R /Prev 1341855 /ID[<1a5eb9fbc7621f479f718e415c5dd1e8>] >> startxref 0 %%EOF 222 0 obj << /MarkInfo << /Marked true >> /Metadata 213 0 R /PageLabels 210 0 R /Pages 212 0 R /StructTreeRoot null /Type /Catalog /ViewerPreferences << /Direction /L2R >> /AcroForm 224 0 R >> endobj 223 0 obj << /Filter /Standard /R 3 /O (2*c #h e5-J-3T\n) /U ([| ) /P -1340 /V 2 /Length 128 >> endobj 224 0 obj << /Fields [ ] /DR << /Font << /ZaDb 207 0 R /Helv 208 0 R >> /Encoding << /PDFDocEncoding 209 0 R >> >> /DA (v'm}wo) >> endobj 230 0 obj << /S 1030 /V 1343 /L 1365 /Filter /FlateDecode /Length 231 0 R >> stream This workshop covers the ideas contained in Don Reinertsens bestselling book, The Principles of Product Development Flow. It becomes a death march where all participants know they are doomed, but no one has the power to stop. Some of these things happen on a schedule that can be anticipated and others cannot. So we need to optimize the rate at which were creating economically useful information. Reinertsen argues that queues are the most important factor in maintaining optimal product development flow. )", "Go! The usual suspects are rounded up for slashing WIP: cutting low-value features, flexible resource allocation and blocking demand. 221 0 obj << /Linearized 1 /O 225 /H [ 1106 1132 ] /L 1346405 /E 969463 /N 32 /T 1341866 >> endobj xref 221 11 0000000016 00000 n So if its a good book, Ill actually finish it. See if any of these sound familiar: 1. But, more importantly, it is easy to quantify. And while its impossible for me to say whats best for your particular situation, I can share what we have found to be the most useful starting point. These queues are caused by common practices that create large batch transfers of work that create large wait times. Closely related is the fact that high capacity loading has a serious impact on cycle times. But they can be managed by reducing batch sizes. By setting up the wrong incentives, we are rewarding the very behaviors that we seek to prevent. For example, take the lean dictum of working in small batches. Ramp meters control the volume of vehicles on the freeway and thereby increase flow without actually limiting access.
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