Skip to main content

How to apply Lean - Kanban for your business

This is the topic of Scrum Breakfast meetup this time, speaker: Ms. Phuong Bui - Technical Project Manager of YOOSE Pte. Ltd.


Lean comes from Lean manufacturing is a method that focuses on elimination of wastes. In other words, this is a set of principles for archiving the quality, speed and customer alignment. The first time I knew about the term "Lean" is  from the book Software Craftsmanship. Sandro recommends if we want to transform our pet projects into a real business, we should get familiar with Lean Startup concepts.

In this talk, Ms. Phuong pointed out some major wastes includes information (ex: unclear requirements), processes (ex: waiting), physical environment and people. Knowing what the problems should be the best way to eliminate them.

The difference between Single item flow and Batch processing is the second main point; and it is the Lean's idea. Batch processing performs many working items in each steps, so that it is easy to get stuck on a step and block the whole process. Single item flow, on the other hand, approaches getting done of the limit working items (small number normally) and no waiting in each steps; so that it is easy to find and remove the "bottleneck" as early as possible.


We can imagine that Batch processing uses the way "push" and Single item flow uses "pull" in conversely.

Lean can be implemented by Kanban, that is somehow similar to the case Scrum implements Agile. In my point of view, there is nothing wrong when saying Lean is like a specification and Kanban is like a Lean's concrete implementation. :)

Kanban board


The following is what Kanban can do:
  • Visualize our workflow: keeping track our work easily
  • Limit work in-process: providing fast feedback to know where bottleneck is and eliminate it by arranging resources reasonably.
  • Make process policies explicit: defining what is DOD (definition of done) in each Kanban columns in order to know how to decide "pull" the items or not.
  • Manage and improve flow.
  • Continuous improvement

Comments

Popular posts from this blog

The 2017 Scrum Guide, and My Notes

https://www.scrum.org Scrum is not only designed for software development Scrum can be used for addressing any complex issues:
1. Research and identify viable markets, technologies, and product capabilities;
2. Develop products and enhancements;
3. Release products and enhancements, as frequently as many times per day;
4. Develop and sustain Cloud (online, secure, on-demand) and other operational environments for product use; and,
5. Sustain and renew products.
Scrum Values is a key factor for building trust and respect among team members The five values are:
1. Commitment
2. Courage
3. Focus
4. Openness
5. Respect
Daily Scrum's questions are more focused on inspection and adaption rather than the status 1. What did I do yesterday that helped the Development Team meet the Sprint Goal?
2. What will I do today to help the Development Team meet the Sprint Goal?
3. Do I see any impediment that prevents me or the Development Team from meeting the Sprint Goal?
Why Scrum still needs Scru…

Git Feature Branch Workflow

Motivator It's important for a team to have an agreement on how the changes of source code should be applied.
According to projects and teams size, we will define a workflow or select one from recommended workflows; the "Feature Branch Workflow" is a candidate.
What is it? - One branch "master" for main codebase
- Several separated branches for features development
Why should we care? - Be super simple and allow each developer works on a particular feature.
- A stable codebase (master) benefits for continuous integration (CI) environment
- Leverage "Pull request" for Code review
How it works? A lifecyle of a feature branch (usually created by a story)
1. Creator creates a new branch from a story.  For example: "ABC-1-setup-projects"
2. Creator checkouts the created branch and works on the branch (commits, pushes)
3. Creator has done the feature, he uses "pull request" to merge his branch into branch "master"
4. Reviewers…

How did I start practising BDD?

At the beginning days I has practised TDD (Test Driven Development) with using JUnit, I approached that I should test methods belong to a class. For example:

I have a class with some methods:

public class A{ public void method1(){ } public void method2(){ } }
And then, I wrote some test methods to check the corresponding ones, for example:

public class ATest{ @Test public void testMethod1(){ .... assertTrue(...); ..... assertEquals(...); } @Test public void testMethod2(){ } }
After that, I know that a test method (ex: testMethod1) should just only tests one thing, so I decided to write more methods for each cases. It looks like the following:

@Test public void testMethod1_When_Case1(){ .... assertTrue(...); } @Test public void testMethod1_When_Case2(){ .... assertEquals(...); }
However, it was not a really good approach because it seems that I just focused on test the functionality of the method of the class. With TDD approach, I knew that I should test the …

Styling Sort Icons Using Font Awesome for Primefaces' Data Table

So far, Primefaces has used image sprites for displaying the sort icons. This leads a problem if we want to make a different style for these icons; for example, I would make the icon "arrow up" more blurry at the first time table loading because I want to highlight the icon "arrow down". I found a way that I can replace these icons to Font Awesome icons.


We will use "CSS Pseudo-classes" to archive it. The hardest thing here is that we should handle displaying icons in different cases. There is a case both "arrow up" and "arrow down" showing and other case is only one of these icons is shown.

.ui-sortable-column-icon.ui-icon.ui-icon-carat-2-n-s { background-image: none; margin-left: 5px; font-size: 1.1666em; position: relative; } .ui-sortable-column-icon.ui-icon.ui-icon-carat-2-n-s:not(.ui-icon-triangle-1-s)::before { content: "\f106"; font-family: "FontAwesome"; position: absolute; t…

Coding Exercise, Episode 1

I have received the following exercise from an interviewer, he didn't give the name of the problem. Honestly, I have no idea how to solve this problem even I have tried to read it three times before. Since I used to be a person who always tells myself "I am not the one good at algorithms", but giving up something too soon which I feel that I didn't spend enough effort to overcome is not my way. Then, I have sticked on it for 24 hours.

According to the given image on the problem, I tried to get more clues by searching. Thanks to Google, I found a similar problem on Hackerrank (attached link below). My target here was trying my best to just understand the problem and was trying to solve it accordingly by the Editorial on Hackerrank. Due to this circumstance, it turns me to love solving algorithms from now on (laugh). Check it out!
Problem You are given a very organized square of size N (1-based index) and a list of S commands
The ith command will follow the format (a[…