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  • User experience (UX) and data quality

    User experience (UX) and data quality Someone I know was moaning recently about a lot of tedious electronic form filling they had to do for work.  It was something that happened once a year, but it was much more lengthy and tedious this year than before.  It struck me that this was a sharply focused example of when user experience (UX) and data quality collide. I realised that I haven’t talked about these two together so far, so this article is a fairly random collection of thoughts about the relationship between UX and data quality. Defining terms I’ve already gone into the meaning of UX a few times, so I won’t repeat that here.  Data quality could (like UX) have lots of definitions, but I’ll go with one inspired by the RST definition of a bug: poor data quality means that you have data that’s less valuable to you than it might otherwise be. This is things like: You have less data than you’d like (in terms of rows, filled-in i.e. non-null columns, or both);Some or all of it is unusable;If you process the data then the output will be less valuable than you’d like, or it will take a lot of effort to get the data into a state where processing it will produce valuable output. Drilling down one more level: Data might be unusable because e.g. a field that should hold the name of a day of the week instead contains the word hippopotamus;Data might produce bad outputs if e.g. it contains duplicate rows,[…]

    23.01.2021 | 4:21 קרא עוד...
  • First Aid for the Mission Statement

    A while back, a tester brought a patient in for treatment. It wasn’t a human patient; it was a sentence about building and testing in an organization. The tester asked me for help. “Could you provide me with a first aid kit for this statement that came from my management?” “We have to move on to DevOps to be able to release code more often but we also have to increase testautomation in any way we can and minimize manual time consuming testing.” This is the sort of statement that needs more than first aid; it needs emergency room treatment. We’ll start with handling some critical problems right away to get the patient stabilized. Then we need to prepare the way for longer-term recovery, so that the patient can be restored to good health and become an asset to society. I’ll suggest a number of quick treatments. As I do that, I’ll identify why I believe the patient needs them. Replace “have to” with “choose to” in each case. Unless someone is about to run afoul laws of nature, of government, or of ethics, no one has to do anything. People and organizations choose to do things. It’s important to preserve your agency. When you have to do things, you don’t have control over them. When you choose to do things, you remain in charge. Replace “move on to DevOps” with “apply DevOps principles and practices”. DevOps is not something to do; it’s a set of ideas and approaches for[…]

    23.01.2021 | 3:57 קרא עוד...
  • Sort numbers with python

    Sometimes we need to sort numbers. In this post I will give a solution a fictive sorting problem. I want to sort numbers with python. Sorting is a part of many tasks. It is useful to know how to use the sorting function in python. We have a list with positive and negative numbers. Create a function that sorts the list by the absolute values. This means without the sign. Some examples will explain what I want to do: sorting [-20, -5, 10, 15] results in [-5, 10, 15, -20]sorting [1, 2, 3, 0] results in [0, 1, 2, 3]sorting [-1, -2, -3, 0] results in [0, -1, -2, -3] My first solution uses the build in sorted function. Let’s create a function that has an input parameter and returns the sorted array. The sorted function has two input parameters. The first one is the list or iterable that you want to sort. The second one is a comparison key from each element in the list. sort_numbers(input): return sorted(input, key=lambda x: abs(x)) sort_numbers([-1,-2,-4,0]) The sorted function will return a new array. The result is sorted according our rules. There is an other solution. A lambda function can be used. sort_numbers=lambda n:sorted(n,key=abs) sort_numbers([-1,-2,-4,0]) The key can be just the abs function. There is no need to create an extra lambda. A list object in python has a sort method. This method will modify the list in place. The output is the same. the_numbers = [-1,-2,-4,0] the_numbers.sort(key=abs) This solution is not the[…]

    23.01.2021 | 12:08 קרא עוד...


  • מבט מערכתי לבודקים – Systems Thinking
    מבט מערכתי לבודקים – Systems Thinking מבט מערכתי לבודקים – Systems Thinking התכונה או מערכת אותה אנו בודקים - אינה מנותקת משאר העולם, תיקון בנקודה אחת – עשוי להשפיע ולפגוע בנקודות אחרות, ולכן על הבודק להכיר את המערכת והקשרים בין חלקיה. כמו…
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  • אם נתקלת בבאג במקרה... - חפש באגים דומים
    אם נתקלת בבאג במקרה...  - חפש באגים דומים אם נתקלת בבאג במקרה... או שחזרה תקלה מלקוח - חפש באגים דומים, סביר להניח שפיקששת סדרה שלמה של באגים מאותו סגנון. בתרגום חופשי מהמסמך הבא של Cem Kaner.   ראה המסמך בלינק הבא, כמו גם רשימת Checklists נוספים…
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