Sunday, January 24, 2021

1st column of a series I am writing in "Testing World" magazine(in Hebrew) about thinking patterns that I found useful in our work as Testers.
First column subject is about the definition of quality.

Link to the full magazine issue:

Friday, July 15, 2016

Experience report of a Tester in (fr)agile world

The following video shows an experience report of a tester working in different scrum team by my friend Yaakov Morgenstein, a Tester and scrum master. 
This short talk given during the latest Jerusalem SW testing meetup that  Shmuel Gershon and I organize  from time to time.

A nice taste from a lightning talks meetup.


Friday, June 17, 2016

White elephants

 According to the legend, the kings of Siam would gift a white elephant to courtiers who had rendered themselves obnoxious, in order to ruin the recipient by the cost of its maintenance. Based on that, the term “white elephant” is used to describe a possession which its owner cannot dispose of and whose cost, particularly that of maintenance, is out of proportion to its usefulness.

It’s very easy to spot a real white elephant. They are rare and stand out from the background. However, Testing projects tend to attract lots of white elephants which are less easy to identify.
I would like to share with you my observation of the white elephants life cycle in testing projects.

The birth of white elephants is usually a result of a match between cool ideas and resources. A future parent with a cool idea pitches it to the herd, which are carried away by it. The cooler the idea is, the bigger the resources allocated to create and maintain it. Many times the declared goal of the cub creation is to save efforts in the long term. Different ideas takes different forms. Common examples are tools that automate manual tasks, enforce a better process, save testers from writing code, etc.

The early days of the white elephant are exciting. Brainstorming happens, designs are created and an
artist is invited.  He is freed from his usual less cool tasks, to give life and nurture the young elephant. New technologies and approaches are learnt. A lot of fun happens all around.
On the elephant’s first birthday, the POC is ready and a demo is presented to the herd. The herd is
excited. The elephant shows a great potential. The proud parents beam and relatives from distant places come to observe the miracle taking his first steps.

The elephant’s caretakers keep raising the cub. They take him outside so he can start living independently and begin contributing to the community. Often, the community members find out that the young beast is not stable enough. The community is very happy to receive him and show a high tolerance of his childish behavior in the early stages. This tolerance may be challenged by the elephant’s habit of requiring too much attention and performing incomplete work.

While the white elephant allegedly reached adulthood it still does not act like an adult.  On the one hand, the people enjoy his company and the cool atmosphere that he spreads around him and they are still hoping he fulfills his potential. On the other hand, each time they try to use him, they are disappointed. Often they continue using the ordinary work elephants and return the white one to his caretaker who still spends too much time nurturing him. On the outside, the picture looks much more ideal. Every guest is taken to see a demo of the white elephant working. His caretaker takes him to conferences within and outside the organization. Prestige is acquired as well as prizes. People still hope the elephant will fulfill the purpose of its creation, despite the growing concerns.

Most of the white elephants dies naturally when the community gets rid of them. The community reaches a point where they lose hope of benefiting from the contribution they had imagined and understand that they do not gain real benefits from the white elephant. Getting rid of the beast is very painful to the people, but they understand that there is no choice. Many times, in order to ease the pain, the birth of elephant 2.0 is declared. The parents plan to make him a better elephant that won’t turn out to be a white one. A soon as the white elephant is gotten rid of, the pain is reduced. 
In very rare cases, instead of killing the white elephant, the people are able to transform it. In most cases such attempts only consume more resources and delay the inevitable.

Spotting White elephants
No modern white elephant is designed to be one. The guy who can help us spot a white elephant, so we can kill him in early stages, is called Roi, or in his full long boring name: Return On Investment calculation.
When the community forgets to invite Roi to the party, no one is there to set real expectations of the elephant. The most romantic time, the birth of the cool idea, is also the time to make the non-emotional calculations of ROI.  It is the time to think about the possible lowlights the new approach is based on.
I suggest that as much as our idea is cool and looks good, so should our ROI calculation be ruthless, to make up for our strong bias in support of our idea.
Doing the ROI calculation once and forgeting about it, is a common mistake. The unexpected happens and turns our elephant into a white one. As more resources are consumed working on the idea, we are more biased towards it and we start to “throw good money after bad”. We tend to take into account the sunk costs. which is not a best decision making practice.

Monitoring the ROI, and continuously comparing our expectation to the reality, can help us identify our white elephant early, so we will be able to get rid of him before he consumes too much of our resources.

Can you spot the white elephant near you?

Tuesday, May 13, 2014

Multi-purpose Testing Tool Kit

I would like to reveal my secret toolkit which I use to tackle any test challenge.

These three thinking tools are shaped to work on every Testing task from small to big. Sometimes, using these tools makes the difference between the ordinary and the expert testers’ way of thinking.
What is in my kit?
I keep the following three thought tools at hand:

·         Definition of Quality
·         Risk Formula
·         Awareness to ROI

Definition of Quality
Every action that we do as testers should have connection to the quality of the product. We
learn the product, test it and provide information, in order to improve the quality. Otherwise - what is the point?
To decide whether an activity is connected to the quality of the product - we must first align ourselves on “what is quality”.
My preferred definition for quality is “value to someone” (Jerry Weinberg). Cem Kaner adds the extension “who matters”, which is useful for focusing on the needs of the person that we are testing for. The benefit of such a basic definition is that it can be used to criticize less basic baselines of quality, like “adhering to the official requirements” or quantitative measurements which are used in the organization process.

The Risk Calculation Formula
Our testing is an activity to mitigate risk. We test in order to provide information about the quality of the product, so that defects with the higher risk to the product quality will be fixed.  

A basic formula of calculating a risk is:

Risk = Probability multiple by impact

Using this formula helps us to compare between the different risks that we want to address. We will try to focus our work first on areas which have the highest probability of having issues that will have the highest impact on quality.

[Late note: My coulege, Amit Wertheimer point out in the hebrew testing forum of Tapuz  that it is important to remember that the caculation is based on our limited analisys  and not on accurate certain factors ]

Awareness of ROI
Testing is an economic activity. Testing consumes resources and is done in order to supply the one who send us to test with information that he values. Whether it is issues that he chooses to fix or risk assessment that will allow him to determine the shipping time of the product.

ROI - return on investment, means that something we do is “worth it” and does not cost us more than what we will get from it. Of course, since Testing is an activity of learning and gathering information, we can’t know ahead of time whether we will learn something that is “worth it”. Here, performing Risk analysis will help us to decide if a testing activity has a good probability of resulting in positive ROI or not.

Let’s look at some examples for using the tools:

A tester gets a new version of the SW and has to decide what to test first. The risk formula will guide him by viewing the risk factors: Looking at the Probability of possible failures, he will determine the areas which have higher probability of having defects - areas that been changed. Areas that tend to be buggy and so on... On the other hand he will look at the impact of possible issues that he can test for: what flows are the most critical for the product users, what type of defects are more costly to the firm. The first areas that he will pick to test will be the ones that will calculate the highest risk - probability to fail, multiplied by the impact the quality. These areas will have the most ROI as he assesses them as the most valuable.
This example can be true also when planning a test strategy for a whole product for a whole team.

Discussing Whether to fix a Defect or not
If you consider quality, risk and ROI, you understand that fixing a bug is not always the right choice.
A smart tester will use the risk formula and will guide the discussion to consider the impact on the quality, the probability that a user will be effected by the defect on the one hand, and on the other hand - the probability that fixing the defect will cause other defects. This way we can estimate the total cost of the fix in terms of risk and decide whether the defect fix has positive ROI.

Sometimes, a proposal to fix a defect is actually a choice between different quality attributes. For example, making the product more secure may reduce the performance. Examining the impact on the “someone who matters”, usually our user, will help us make a choice.

ROI is a key thinking tool to examine investments in infrastructure, tools and automation. A realistic estimation of how much the tool will cost - in terms of development, integration, maintenance and fees versus the benefits we expect to gain, such as time saving, additional test coverage, will help us decide whether to “go for it” or not.

Some Critique of the Above
Essentially, all models are wrong, but some are useful - said George E. P. Box. This is true for the thought models that I just described. Since Testing is a learning activity, and learning is unpredictable, sometimes wandering around may be the right thing to do. Low risk and low ROI activity that we barely connect to the product quality in the first place, may lead us to critical information that has high ROI and high risk which is connected to the product quality.

What is your secret tool? Do you use a different version of similar tools? Let me know.

Sunday, January 12, 2014

Professional meeting? JeST DO IT

This post is about my experience of organizing Tester’s meeting. It is true  as well for any other meeting, be it Software Developers, Social workers or a meeting of Puppeteers.

The 3rd meeting of JeST – the Jerusalem workshop on SW Testing is just over. Such a meeting is a great opportunity to meet fellow testers, and share experiences and ideas.
I am the proud founder of JeST, together with Shmuel Gershon, Asher Samuels and Alon Waisbard (look in Twitter for @sgershon, @absamuels  and @awaisbard ). I am telling you that because less than a year ago, organizing such a meeting, looked to me as a distant vision, something that will happen in the far future when I will develop the complex skills necessary to organize such an event.
But it doesn’t.
A moment during JeST2

Organizing a meeting is so easy, that I must share how easy it is, with you. The main issue to overcome is the mental block and just do it. To help you overcome this block, I prepared a list of the things that you don’t need, in order to hold such a meeting:
1)      A budget
You will be able to find a place to host a short meeting. You don’t need to rent a conference hall. It can be the room in the company of one of the meeting participants, or one’s home living room. Refreshments can be brought by the host or by the participants.  If it works for you and the potential participants, you can schedule a meeting in a quiet restaurant and address the need for both the location and refreshments.
2)      Sponsors
Since you don’t need a heavy budget, you don’t need an organization to support your meeting. Although I welcome cooperation and networking, which naturally happens in such meetings, I prefer to remain independent and stay away from organizations that try to use the meeting for their own promotion.
A thank you note should be enough as a return of the hosts good will.
3)      Heavy logistics
You don’t need a full-time administrator to organize such a meeting. Split the tasks between a few friends and it will not consume too much time. Use social networks to spread the word. Meetup service can simplify the process even more, in return for a payment of a few bucks.

(Late note: there are many Meetup groups which are allready dedicated to promote events like yours. See for example: ILTechTalks group. All you need is to suggest your event in such group, free of charge)
4)      Professional presenters and presentations
Not everyone who has interesting things to say is a professional presenter and the length of a
JeST3 agenda
presentation does not make it better (most times it’s the opposite). For our meetings, we chose a format of lightning talks followed by a discussion.  One time, we had a “regular” presentation, which was great too, but the most significant part for most of the participants was the discussions that we held.
5)      A large number of participants
Rating is overrated. While it is nice to see many people come to “your” meeting, a large audience has its drawbacks too – the atmosphere is less intimate, it’s harder to facilitate the discussion, and not every participant feels free to express his opinion. When I started to organize the first JeST meeting, I was worried that the meeting would not  draw a “respectful” number of participants.  I did the “Worst case scenario” drill and came to conclusion that if only me and the other 3 folks that shared the idea of organizing the meeting would come, it would not be a waste of time.  At the end the meeting turned out to be a success, also by the number of participants.
All the above are not a “must have” in order to organize your testers meeting. All you need is Testers and a love of testing.

Friday, November 8, 2013

A small cool macro that makes Mind Maps and Spreadsheets better friends

In case, like me, you belong to the Mind Maps lovers’ group, there’s good chance this tool will interest you.
I like Mind Maps because they are easy to create and evolve. They represent data in a way that makes sense to human beings.  
When you want to add a leaf to any branch of the data structure, you don’t need to mess around, as it is just a natural development of the idea representation.

On the other hand, Spreadsheets have their own advantages. They are able to perform calculations on the data, and sort and filter it.

I like to combine both Mind Maps and spreadsheets in my work. I summarize ideas in a Mind Map and move it to an Excel™ spreadsheet in order to use it in a way that involves calculations and filtering.
I use Xmind for creating Mind Maps. Moving the data from the Xmind application to an Excel sheet is very easy: copy-paste the central subject into the sheet. 
However, the data format in the target sheet is not very useful for my goal – each hierarchy is placed in a new column, as you can see in picture #1. 
I would be happier if I were able to have all the data in same column, indented by the hierarchy, as you can see in picture #2. 
It would be even cooler if we were able to use Excel’s “grouping” feature so we could see the exact hierarchic level of the data, see picture#3.
I will not keep secrets from you. I wrote an Excel VBA Macros that provides the wish list above.  Feel free to use it, just copy it into your VBA editor.

Note: while this tool is great for porting the Mind Map data into Excel, once you’ve used it, the data won’t be easily exported back to MindMap. If you find it necessary, you can create a VBA macro that will help to do that.

I created three macros: one that moves the data to one column and indents it according the hierarchy. The other groups the data according to the indentation and the third one which calls both macros.
Before that you run the macro, make sure that the cells that conatins the data are in the "selection" as you can see in the following video:

 If you have  any questions, Tweet me: @testermindset
The VBA code:

Sub moveIndentGroup()
' This macro call the 2 other Macros in order to perform all actions usingcommand

    LastRow = Selection.Cells.Rows.Count
    Call moveAndIndent
    Call GroupIt(LastRow)
End Sub

Sub moveAndIndent()
 Dim rCell As Range
    Dim rRng As Range
    Set rRng = Selection
    For Each rCell In rRng.Cells
       If ((rCell <> "" Or rCell <> 0)) Then
        Cells(rCell.Row, 1).Value = rCell.Value
        Cells(rCell.Row, 1).IndentLevel = rCell.Column - 1
        If rCell.Column > 1 Then rCell.Value = ""
       End If
        Cells(rCell.Row, 1).HorizontalAlignment = xlLeft
    Next rCell
End Sub

Sub GroupIt(Optional LastRow)
    If IsMissing(LastRow) Then LastRow = Selection.Cells.Rows.Count
    For j = 1 To 5
        For i = 1 To LastRow
            If Cells(i, 1).IndentLevel = j Then
                FirstCell = i
                LastCell = i
                While (Cells(FirstCell, 1).IndentLevel <= Cells(LastCell + 1, 1).IndentLevel) And LastCell <= LastRow
                    LastCell = LastCell + 1
                Range(Cells(FirstCell, 1), Cells(LastCell, 1)).Select
                i = LastCell + 1
            End If
        Next i
    Next j

End Sub

Sunday, November 3, 2013

Dealing with Stress take 2

In case that you are reading this post, there is a chance that you read my blog post about Stress.
This post was transformed twice: first, I turned it into an article in Tea Time with testers magazine, than it became a presentation in QA&Test 2013 conference at Bilbao, Spain.

The conference was awesome. Hospitality was great. I had an opportunity to get to meet and share ideas
with many cool testers from all over the world. I was also able to experience presenting at an International conference.

Besides the format change – from a blog post to an article and then into a presentation, the ideas themselves emerged and developed as I got a lot of feedbacks while working on the material.

The main idea behind the work is the need to connect our Stress tests to the user’s needs . To do that, I suggest categorizing our Stress tests and failures into 3 main categories: Multiple experiments, Stability over time and Load.
While working on the presentation I added a few aspects which are connected to the failure classification and Stress test planning:
·         Assessment of risk when selecting risky flows for multiple experiments.
·         Taking in account the impact of the product on the system stability.
·         The need to find good oracles beyond the official requirements when defining the load and stability targets.
·         Perform load tests of few types :
o   The largest amount of data or actions which has meaning  for the users
o    The full capacity of the product – in order to spot degradation in the capacity before they has impact on the users.
·         Use good logging mechanism to gather data on all the experiments that your stress performs.
·         Monitor the system resources in order to quickly find stability issues .
Since I was scheduled to present on the last day of the conference, I had some time to get inspiration from a few people that I met during the 1st two days. The night before the presentation, I changed the summary slide from a list into a mind map that summarizes my takes on the subject.

I am publishing the mind map and would like to ask you to review it and contribute to my initial work on that. I promise to give you credit if you’ll provide meaningful input.

Click to enlarge