Old posts will be here soon !!
30.9.2017: Old posts are now back on line with little reformatting and typo corrections.
Old posts will be here soon !!
30.9.2017: Old posts are now back on line with little reformatting and typo corrections.
Success stories and surveys support agile software development. In addition to anecdotal evidence there are little hard figures to guide our decision making. Here cumulative business value charts are used to describe the impact of agile and traditional choices to the bottom line. Focus is on visualizing the economic impact of individual agile practices and assumptions of their costs and profits.
A chart describing the cumulative earnings as a function of time is a basic tool for optimizing the return of investment, ROI. The line is higher all the time if we have multiple deliveries. It is still better if the more profitable increments are deployed the first. This advantage in time-to-market is clear also in the surveys. Double the results in half of the time assumes that earlier deliveries have business value and that the additional cost of more deliveries is small.
The cost of change must be small if we proceed empirically and feedback directs our product and development process. Customers pay these changes when they create more value than the costs of delaying and implementing the the changes.
Risks are an integral part of any design. In software development we do not commonly know what the users actually need and how we use new technologies that create the results. The cone of uncertainty is high. Reports of more than hundred-fold effort differences are common. Sales, savings and profit estimates are so inaccurate that it is quite common to ignore them altogether.
Traditional mass production uses specialized lowest costs work force, rigid processes and invests in tools. It locally optimizes the cost of the tasks that workers do and is often blind about the required administrative burden.
Traditional and agile approaches have different assumptions of the relative costs of the parts of software development. Agile assumes high risks, high integration and collaboration needs, low predictability and low cost of change.
Lean thinking is particularly well-suited to today’s battle of margins in a weak economic environment because it comes from Toyota’s innovations in post-war market, where demand for cars was occasional, sparse, intermittent and difficult to predict.
In customer driven business model it is important to sell what the customers need and reserve production assets just after the customer’s order. Sales and marketing should emphasize customers more. That sells better than pushing what we happen to offer. Listening to customers is an important way to find tacit signals necessary for developing the products. We can meet the needs by preferring simple and fast solutions and avoid the tendency to invest heavily and slowly. Consultation business can begin lightly without extensive materials and finalized products. Consultants learn by doing, working together with the customers.Sales should not be overly concerned about the availability of the experts and resources. There are always more quotations than deals. Reservations should not be done before the commitments are clear. Transparency helps everyone to adapt to rapidly changing situation in available consultants and speculations and realizations of the deals.
The ideal situation in which the company acquires the resources only when needed is not possible. Prices are higher if you cherry-pick. Transaction and purchasing costs must be accounted and availability of the resources in peak demand is not a sure thing.
Profit calculation is more difficult when the equation includes fixed costs. Annual rent of a typical agile team room could be 10 000 €. The charge for the corresponding space in Technopolis is 400 € per day. If the rented space would be used 10 days a year, it would cost € 1 000 a day. If we could use it 100 days a year, it would cost € 100 per day. It would save a lot if the same space could be used as the office space for the team, internal meeting room and meeting room for the customers. You have to invent how to profitably change the configuration of the space to fit the needs of the moment. It is probably cheaper than having separate rooms for each purpose or renting more space each time.Businesses are crazy about premises in Finland. They have always too much space and in too costly locations. Home offices have a clear competitive advantage.The situation is the same if we look at the profitability of the sales. If the profit of a consulting day after variable costs like accommodation, travel and the consultant’s fees and the avalanche of the general expenses is € 200 to cover the seller’s costs, each salesman must sell 500 days a year to reach € 100 000 gross margin paying a typical 5 000 € monthly salary for him. If sales are lower keeping the margin by increasing the selling price makes it more difficult to sell in a tense competition situation. ICT professionals have full-time employments because getting good people in bad terms is not possible. There is a long learning curve for each task and there is no visible end of the demand of their skills. Vendors’ success factor is a small cross-functional team in which all members are able to do virtually any of the tasks in the backlog. In addition, the team members could be responsible for a product development, support, sales support and marketing (especially brochures, blogs and public appearances). This ensures useful work throughout the year despite of the typical seasonality.If an organization is heavily based on specialized roles in its business model the weakness in demand is immediately reflected in the bottom line. It can not guarantee adequate income to its partner network and which fades away focusing on other customers.
Lean organization does not require a strongly specialized and multi-tiered hierarchy of managers because teams will make virtually all operational decisions. Maintaining and calculating profit margins is easy because organization’s general expenses are not significant. To get any work done creates a huge amount of coordination work if every task has its own manager. It is a slow and expensive. Trade of squirrel skins, purely speculative budgeting, performance management, etc. will add operations its own heavy share in the bottom line.Economic monitoring is simple. Lean measures throughput times in addition to sales and gross margins.
Keynotes of Niels Pflaefing “Organize for Complexity” and Brain Robertson “Holacracy: A Radical New Approach to Management” summarized the agile position on leadership.
In a rapidly moving world old paradigms of management are not fast enough. Teams near the customer must do the decisions using the power that organization’s constitution assures them.
More information about their ideas can be easily found from their books: Organize for Complexity and Holacracy . These ideas of leadership are essential in understanding why agile transformations are so difficult. It is hard to be agile if the management structures are not changed.
Another hot topic was scaling. SAFe is not the only option and LeSS seems to get more support from the agile community than it, because SAFe’s top down approach is less capable of changes.
Scrum Alliance has now more than 400 000 members and it is growing with about 6 500 new members every month. The number of trainers and coaches is now 188. Members will get more content in Scrum Alliance’s site and trough the learning consortium.
Scrum Global Gathering 22.9- 24.9.2014 in Berlin was sold out. Its 600 participants heard the good news:
1) The number of certified members of Scrum Alliance of is now 350 000 and it will grow by 5 000 every month.
2) Certifications will be extended so that the number of the upper level of Certified Scrum Professional certificates will be determinately increased with the help of additional training courses.The 200 trainers and training companies involved in the community will increase the range of advanced training courses in the technical and the leadership areas.
3) Scrum is converging as the organizations in the area, Scrum Alliance and Scrum.org (8 000 members), agreed on a common definition of Scrum.This means in practice that our offerings of current and forthcoming trainings at agile leadership, interpersonal skills, facilitation, agility, scaling, Lean, Kanban, Certified Scrum Developer, agile testing, agile architecture, etc, etc will get increasing global marketing support from Scrum Alliance.Course development takes place in the spirit of the Lean Startup based on customers’ needs.
We are able to offer advanced courses that our clients request as the course contents have already been prepared at the global level. Many of the MIF‘s interaction skills courses and others courses are inherent add-ons to basics of Scrum.
Example driven development is the best name to cover acceptance test driven development, behavior driven development and specification by example approaches. The concepts of acceptance test, testing and a tester have been defined long ago. I have found that changing their meaning is difficult. Even when we talk about test driven development we have to spend a lot of effort to explain that it is not done after programming and not by the separate testers.The same happens if we talk about specifications.
The old school uses user stories as a new way of writing specifications, which could be then send to a separate development team. Collaborative design is not happening as it should. Though I like the idea of programming with natural languages, I think that they are too abstract and too prone to interpretations. Examples are a good way to explain things unambiguously and in a way that both the users and programmers see useful.
Behavior is something that programmers talk about, but for users that might not be as clear as examples. With example driven development I want to emphasize collaborative design where users and developers work together using examples to clarify how users interact with computer programs to achieve business benefits that pay the return on investment.
Traditionally we have specifications, tests and code written to different purposes. They should not just be consistent but the same. In agile tests are specifications and in behavior driven development code is moving closer to the tests. The ultimate goal might be that we have only one description of the program that can be understood by both the users and the compilers. That is one goal of visual programming.
The lack of programmers has been tried to be solved by moving the work to users. This approach has not been very successful because building large programs requires a lot of logical thinking and solutions to huge amounts of details. Software designers are not endangered species but programmers might be if the abstraction level of programming goes up.
In this list I have a lean and management focus:
Hope, Jeremy: “Beyond Budgeting: How Managers Can Break Free from the Annual Performance Trap”.
Denning, Stephen: “The Leader’s Guide to Storytelling: Mastering the Art and Discipline of Business Narrative (J-B US non-Franchise Leadership)”.
Denning, Stephen: “Radical Management”.
Reinertsen, Donald G.: “The Principles of Product Development Flow: Second Generation Lean Product Development”.
Reinertsen, Donald G.: “Managing the Design Factory: A Product Developers Tool Kit”.
Goldratt, Eliyahu M.: “Theory of Constraints”.
Ries, Eric: “The Lean Startup: How Constant Innovation Creates Radically Successful Businesses”.
Gojko Adzic: “Specification by Example: How Successful Teams Deliver the Right Software”.
Fowler, Martin:”Domain Specific Languages (Addison-Wesley Signature)”.
Big front-end designs are bad, because they do not match the reality. The devils are really in the details. However, the cost of changes is considered too high and the illusion of predictability makes us close our eyes on reality.
In Scrum we say that we should focus on infrastructure and architecture in the first Sprints. Decisions about our software development environment, tools and architectures are not easily reversible. The situation is much worse in the construction business. If we are building a bridge or a tower of Eiffel we can’t start it again from the beginning if the base is not strong enough.
The case is not that bad in software development. We use software instead of electronic circuits just because it is easier to change software than hardware.We need to have appropriate engineering practices to change Kent Beck’s famous cost curve. Extreme programming contains many practices that are needed to make the code easy to change. In addition to these we need solid architectural principles and rigorous attitude to quality.PowerPoint architectures outlined at the first Sprints are not good enough. We need executable architectures and extensive testing with highest priory business functionality to make sure that the quality attributes, non-functional requirements, are OK, before we continue deeper.We don’t stop to that. We require that the architectures are easy to change. Ease of refactoring and testing can be achieved with known design patterns.
My colleague has written a provocative blog entry about the current situation of agility.Actually, we are promoting our new course: Agile Engineering Practices, which can be used as a part of Certified Scrum Developer curriculum.
I found a revealing discussion at a popular suomi24.fi-site titled Ketterä IT-helvetti (agile IT hell ). It is amazing how often daily Scrum is practiced just opposite of Scrum’s basic idea of a self-organizing team.
This 15 minutes is just for the developers to say hello to each other and coordinate days activities. They need to know the situation after yesterday’s work because software development is not predictable. Sometimes tasks estimated to take 2 days take 5 days and sometimes they are ready after one day. So everyone needs to know where the team is and agree on what to do next.
The metaphor of chickens and pigs is meant to make sure that managers do not use that for micromanaging the people. Command and control is bad because it destroys peoples’ natural work motivation. People including developers want to achieve something and autonomy to do it – not that they are given orders and controlled tightly. Command and control reduces productivity and creativity which is really harmful in an art like software development. Psychological studies have shown that time after another.
Pair programming can be done in a way that does not decrease the motivation. As the code is owned by team and every team member is responsible of changing any peace of it the team needs a way to teach the secrets of the code modules to everyone in the team. That is pair programming. It prevents harmful specialization and at the same time decreases the number of errors in the code. Your pair is not watching and controlling what you are programming but you two work together to create great software. Two creative minds coding and discussing together is a way to learn from each other and do a great work. Pairs are changed normally on daily basis so that different angles on the problem can be thought. Pair programming should not be a stressful situation like the one described in suomi24. The team should discuss about the situation in its retrospective and decide how to continue to find the the joy of work that agility gives when it is practiced at its best.
My talk in Scum Gathering Amsterdam is now visible. See more about visual software design with themes and epics The place: 10:00 – 11:00am on Tuesday, November 16 in Foyer
Synopsis: We have issues like user stories, themes, epics, UI mockups, business rules and acceptance tests that are used in creating our understanding of what to do and how. We groom product backlogs and have Sprint planning meetings and design tasks in Sprint backlogs. This IdeaCamp session pursues to tell us how to put these all together in real life projects.
The slides and result flip charts are now available at SlideShare. I like especially the idea of drawing users’ value stream with epics shown by one of the groups in the idea camp.