Guaranteeing Software program High quality at eBay Denmark

High quality isn’t solely about not releasing bugs to manufacturing, it’s way more than that. High quality is a product that’s user-friendly, straightforward to entry and use, has excessive efficiency/brief load time, and is about code that’s steady and simple to take care of.

Jette Pedersen gave a speak about how to make sure good high quality merchandise at Swiss Testing Day 2020.

Testing at eBay Denmark is finished on totally different ranges to extend person expertise, as Pedersen defined:

Consumer testing, the place we for instance exit and speak to customers and ask them to make use of/have a look at a prototype, will give us extra insights of the customers’ wants and ideas, and whether or not or not they perceive our ideas with the product. Efficiency checks will inform us if our web site performs inside our expectations. A/B testing will inform us which variant of what we’ve constructed the person likes greatest.

Pedersen talked about that to ensure they’re testing the correct issues, they use take a look at design strategies. An instance is to make use of equivalence testing mixed with boundary worth evaluation. This can just be sure you take a look at all legitimate/invalid partitions solely as soon as, and that every one boundaries on every partition are examined with the correct values for the legitimate/invalid partitions.

As an alternative of attempting to provide you with a complete resolution from the beginning, eBay Denmark does loads of experiments to search out the correct technique to construct merchandise. They arrange a speculation, for instance:

If we provide our customers a brand new privateness product


Then we are going to enhance vendor NPS


As a result of they’ll select in the event that they need to present their dwelling handle or not

Subsequent, they tried out a pretend door take a look at to search out out if customers would purchase the product. The take a look at confirmed that the customers needed the product, so that they constructed it after which began their A/B cut up testing to search out the correct format.

InfoQ interviewed Jette Pedersen, senior QA software program engineer at eBay Denmark, about guaranteeing high quality, coping with dangers that affect high quality, what they’ve realized about high quality, and enabling high quality considering all through the entire course of.

InfoQ: How can we guarantee good high quality for our merchandise?

Jette Pedersen: We’d like to consider high quality from the start of a mission or job. To make sure that we construct one thing that the person can and can use, we do loads of experimentation, however earlier than we begin that, we’d like to consider various things.


  • Who will we construct it for?
  • Are there particular calls for for efficiency?
  • What are the necessities, and are they recognized to us on the stage of the mission we’re in?
  • Are there any UI adjustments?
  • What’s the threat evaluation for the world we’re working in?
  • New safety precautions also needs to be considered

All of this we speak by way of in a kick-off on the early begin of the mission.


When the product is being developed, we frequently use TDD and pair programming. This helps us to share data and rapidly overcome any obstacles that come alongside the way in which.


To have the ability to make sure that we get quick suggestions if something breaks in manufacturing, we additionally speak about if we must always arrange monitoring and which sort of take a look at automation is required.


A rule of thumb is that every one excessive threat and a few medium threat areas (if attainable) ought to be lined by some sort of automated take a look at.

InfoQ: What are the dangers that may affect high quality and the way can we cope with them?

Pedersen: There are numerous various kinds of dangers concerned in product improvement.


  • Do we’ve sufficient data concerning the product space that we are going to be working in? If not – do we’ve entry to an oracle or the place can we discover the solutions?
  • How a lot expertise do we’ve with the framework used to develop the product?
  • Have we labored within the space of code earlier than?
  • Is there a deadline? If that’s the case, oftentimes high quality will undergo. We’re fortunate that we not often have deadlines.

The best way we cope with the dangers is to attempt to establish as many as attainable after we begin a job e.g. at a job kickoff. When speaking about which dangers might affect the duty, it additionally helps us to establish if the duty is in a excessive, medium, or low threat space, and we are able to then take motion to mitigate the dangers. It might be that pair programming might be an answer. It is also that we’d like extra individuals to assist out both with programming, testing or who’ve the wanted data within the space we’re working in.

InfoQ: What have you ever realized about high quality over time?

Pedersen: You want to consider high quality proper from the start of a mission. It’s so less expensive to search out any points to start with than later within the mission.


Additionally utilizing a risk-based strategy provides us a extremely good indication of what we have to do to make sure that the standard is excessive sufficient. It additionally ensures that we don’t spend an excessive amount of time on guaranteeing the standard, if it isn’t crucial.


At this time, guaranteeing the standard isn’t one thing that lies solely inside the function of a QA. If you happen to get the entire staff to take accountability for the standard, then you’ll have way more success in delivering top quality to the customers, and also you wouldn’t have the issue of the QA being a bottleneck.


I’ve additionally realized that efficiency and usefulness are important for the product. If the product doesn’t carry out or the person doesn’t perceive how you can use our product, then it doesn’t matter if the product has top quality. The person gained’t use the product once more.


We even have a excessive deal with automation, in order that we’re in a position to do steady supply at a quick tempo.

InfoQ: What’s your recommendation for enabling high quality considering all through the entire course of?

Pedersen: Get your colleagues to agree on what high quality is. Assist them to create a mindset as a QA. Ask questions as a substitute of giving the solutions.


Talk with one another all through the entire mission. The extra we talk and assist one another out, whether or not that’s after we code or after we take a look at, the higher the standard the product may have. Use a risk-based strategy to grasp how a lot high quality assurance it’s essential do, and at what degree. Be certain that your colleagues know and perceive how you can do a threat evaluation.


Have religion that your colleagues are simply as able to guaranteeing the standard as you might be.

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