This is a meeting where all the stakeholders are invited: development leads, architects, QA leads, Product Management, Operations, Customer Support, my sister — you get the idea. We never feel comfortable declaring success with any deployment. Many companies approach product development as if it were manufacturing, trying to control costs and improve quality by applying zero-defect, efficiency-focused techniques. Posted by Scott Sheppard at 04:00 AM in Books | Permalink, Tags: ( Log Out /  We sleep in, we relax, and basically enjoy the two days of rest. Celeritas Publishing, 2009, 304 pages, $29.14 (Kindle $27.68) Reviewed by Tom Bellinson . We then gather a very unhappy engineering corps to start working on the issue over the weekend, all while receiving, what seems like every minute, requests for an update on the issue. Rinse and repeat Tuesday, and then again on Wednesday. Note: when the density is too high, flow is inherently unstable since the feedback cycle is regenerative. Control parameters that are both influential and efficient – … Please enable JavaScript if you would like to comment on this blog. Product focused is high volume, low varietyprocesses. Book: The Principles of Product Development Flow ~$45 on Amazon.ca Published in 2009 Award winning Difficult material [page 169] In other words, we also need to fix issues in the work we are currently actively involved in. The word hot fix is no longer part of our dictionary. Book Club Part 1. The author has written this book to show that the dominant model for managing product development is wrong to the core. incremental benefit of adding parallel paths progressively decreases, CHART: Queue size vs Capacity Utilization: Queue size increases rapidly with capacity utilization, CHART: Queue Size with Different Coefficients of Variation: Reducing variability has much less effect on queue size than lowering capacity utilization, CHART: Queues Amplify Variability: As we increase capacity utilization, our processes become increasingly unstable at high levels of capacity utilization, CONCEPT: Theoretical Optimum Capacity: When the cost of capacity rises then optimal capacity decreases, CONCEPT: Little’s Formula: Wait Time = Queue Size / Processing Rate, TERM: jidoka: stopping a processs from making waste, QUOTE: Don’t test the water with both feet – Charles de Gaulle, CHART: Slippage Effects: Slippage in projects rises exponentially with duration, FORMULA: Optimum batch size is a function of holding cost and transaction cost, TERM: heijunka: mixed leveling done in production planning, QUOTE: Anyone can be captain in a calm sea. The Principles of Product Development Flow: Second Generation Lean Product Development eBook: Reinertsen, Donald G: Amazon.in: Kindle Store.. Inventory is the biggest waste, U-Curve principle: important trade-offs have a U curve, Imperfection: imperfect answers improve decision making, Small decisions: influence the many small decisions, we focus on the big decisions, First perishability principle: many economic choices are more valuable when made quickly, Subdivision principle: inside every bad choice lies a good choice, Early harvesting: harvest the early cheap opportunities, First decision rule: use decision rules to decentralize economic control, First market: decision makers must feel both cost and benefit, Optimum decision timing: every decision has optimum economic timing, Marginal economics: always compare marginal cost and marginal value, Sunk cost: do not consider money already spent, Buying information: the value of information is its expected economic value, Insurance principle: don’t pay for more insurance than the expected loss, Newsboy principle: High probability of failure does not equal bad economics. The Principles of Product Development Flow: Second Generation Lean Product Development. Monday, May 14, 2018 4:51 PM The Principles of Product Development Flow by Donald G. Reinertsen (2009) Current price is under $28.67 for hardback plus shipping on Amazon. If you've ever wondered why agile or lean development techniques work,The Principles of Product Development Flow: Second Generation Lean Product Development by Donald G. Reinertsen is the book for you. Principles of Product Development Flow Question. We can't have developers working on other features or bug fixes since we are in code freeze. In contrast operating to the right of the throughput peak promotes stability because of a negative feedback effect. PLAY. SUMMARY: This chapter attempts to summarize Jez Humbles’s book. Provide sufficient capacity margin to enable cadence. First run unit tests, static code analysis, second run service or api tests, lastly test the User Interface. Donald Reinertsen has some vital knowledge to pass on. At first I did not understand this concept as it seems counter intuitive, but (to a point) the less we did, the more we accomplished. Much more information here would have been useful and the lack of it reduces the value of the book. In product development fast feedback is capable of altering this curve. TDD is "a software development process that relies on the repetition of a very short development cycle: first, an (initially failing) automated test case is written that defines a desired improvement or new function. (See Principle B4: The Batch Size Risk Principle.) Avoiding bottlenecks typically requires action at a point before where a bottleneck occurs. Doing so reduces overhead and allows project checkpoints to occur at regular intervals instead of on targeted milestone completion dates. Reinertsen starts with the ideas of lean manufacturing but goes far beyond them, drawing upon ideas from telecommunications networks, transportation systems, computer operating systems and military doctrine. It's 4:00 am Saturday morning. I am in the process of reviewing each chapter. By David Walden. Exploit economies of scale by synchronizing work from multiple projects. After another "Go/No Go" meeting, we confirm that the deployment will happen later that afternoon. He explains why invisible and unmanaged queues are the underlying root cause of poor product development performance.… Article/chapter can be downloaded. Our customers are delighted. Since we're a cloud company, our customers never sleep, and there's always a customer who logs on over the weekend and runs into a bug, or worse, cannot access their data. Customer support requests and emails start pouring in. Have a good economic framework so that tradeoffs are easy to make, Interconnected Variables. We can only resynchronize to a regular cadence if we have sufficient capacity margin. Condition the flow just before the bottleneck. Twitter blows up with complaints. International flight must have enough delay from connecting flights. Change ), You are commenting using your Facebook account. When Thursday comes around, our entire team waits for one thing and one thing only: the infamous "Go/No Go" meeting. Use a regular cadence to enable small batch sizes. Work late. The Principles of Product Development Flow available to buy online at takealot.com. The third is, of course, the "Go/No Go" call for the hot fix, and no hot fix can be deployed without doing a post-mortem. Principles of Management - Chapter 7. Book review: The Principles of Product Development Flow. CONCEPT: Configuration is under revision control to ensure repeatability. Use cadence to make waiting times predictable. Instead, you can download the first chapter for FREE. Synchronization causes multiple events to happen at the same time, CONCEPT: FIFO queues work well for similar task durations and similar costs of delay, CONCEPT: WSJF: Weighted Shortest Job First. For the sake of brevity, let's say everyone gives their "Go!". Chapter 1. The later we bind demand to resources, the smoother the flow. Product Development Flow: Second Generation Lean Product Development by Donald .The Principles of Product Development Flow by Donald G Reinertsen, 9781935401001, available at Book Depository with free delivery worldwide.Search for Principles Of Development .Save Up to 90% on Marginal Profit: Profit is maximized when total value is furthest away from total cost. When delay costs are equal, do the shortest job first. What words come to mind: dysfunctional, unhappy customers, unhappy employees, not scalable, not resilient, frustrating, time-consuming, . Use a regular cadence to limit the accumulation of variance. CHART: Highway throughput is a parabolic function of speed. Route work based on the current most economic route. Schedule frequent meetings using a predictable cadence. To enable synchronization, provide sufficient capacity margin. Make sure buses start on time. And this is in large part due to a focus on and adoption of Test Driven Development (TDD). The Principles of Product Development Flow will forever change the way you think about product development. Validate the fix. Important book on product development June 20, 2009. You may freely distribute this document, in either electronic or print form, but may not use it commercially or use it to make derivative works. Celeritas Publishing, 2009, 304 pages, $29.14 (Kindle $27.68) Reviewed by Tom Bellinson . And of course, we have been in code freeze for the past 2 weeks, which gave our small army of QA personnel time to test the code we are just a few days from releasing. Push the code. 7. Then, the minimum amount of code is written to pass that test, and finally, one refactors the new code to acceptable standards." Don’t buy the book for somebody who won’t read it. Download: ReinertsenFLOWChap1. This Monday almost immediately turns into a "let's schedule meetings for the rest of the week so we can discuss all remaining issues and coordinate the release" kind of day. Figure 5 – Business Plan Development Process (Illustration by Lee A. Swanson) Essential Initial Research. The author defines the most important metric for us to focus on as life-cycle profits. You may freely distribute this document, in either electronic or print form, but may not use it commercially or use it to make derivative works. It is guaranteed to change the way you think about product development. Control occupancy to sustain high throughput in systems prone to congestion. Triage the new bugs. Off-season hotels. On page 1 of this book, Reinertsen states his ambition for the book: “I believe that the dominant paradigm for managing product development is fundamentally wrong….I believe a new paradigm is emerging… Reinertsen has now written an important new book, The Principles of Product Development Flow — Second Generation Lean Product Development. The next sub-part is on continuous delivery architecture, then post-deployment validation and finally CD. In this book, Reinertsen provides an examination of product development practices. We go through our nth bug triage session, addressing enormous Jira backlogs, trying to figure out which is the last bug that is truly important so that we can fix and squeeze it into this release. Trickle. The Principles of Product Development Flow: Chapter 1 Disney says you have a 30 min wait from here, not a queue size. Very often, issues get raised, which then postpones the deployment another week. The Principles of Product Development Flow – Chapter 1. In other words, instead of checking projects at the end of phases such as design complete or code complete, evaluate progress at the end of each month to determine where corrective actions are needed. | Save to del.icio.us. Learn. We start the meeting by going around the table and asking everyone if they are ready and feel comfortable with tomorrow's release. This chapter provides three examples of specific system development that illustrate application of human-system integration (HSI) methods in the context of the incremental commitment model (ICM).The examples are drawn from the committee’s collective experience and specific application of the concepts developed during our work to these particular projects. ( Log Out /  Develop and maintain alternate routes around points of congestion. Let me preface this review by stating for the record that I read a lot of non-fiction books. This comes from R.L. Use of a regular, predictable rhythm within a process, TERM: Synchronization. Ask 10 people Ask them to independently estimate what it would cost the company, in pretax profit, if their project were 60 days late to the market. You can’t change just one thing. Blog trolls do their thing. Although unexpected work can include the need to generate a hot fix, it can also involve determining that the work is more involved than originally anticipated. Correctly managed, centralized resources can reduce queues. Many ways to pay. SUMMARY: Some very complex ideas are presented in just a few pages. TERM: Continuous Integration: A process that monitors the source code management and triggers a build. Reinertsen argues that queues are the most important factor in maintaining optimal product development flow. As such, Chapter 7 proposes that the strategy for doing so involves getting projects into a regular cadence to improve workflow. This is something I learned from Theresa King at Verizon. 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