A rough notes for Quality Analyst interview

Er. Rahul Abhishek

Quality Analystrahulmithu.abhishek@gmail.com

1- What is Quality? Quality is a back bone of any organization which help to grow in market for long

term. Quality is something which understand customer’s need & can fulfill their

requirements. It is something which meets customer’s expectation & increase customer’s

satisfaction. It help to increase customer’s faith on the product.

2- Why you want to join as a QA? As quality is back bone of organization it will help me as well as organization to

grow. As the job is process oriented it will give me the opportunity to do try several things

at the time. In a single moment I can apply number of works at a time in which I am good, such

as - the needed documents, test the application, write test plans and test cases, prepare reports and retest them once again if the need arises & also provide feedbacks.

My favorite task would be reducing defects. The more defects I find while working, the happier I will be.

3- What are the basic Quality tools?

There are 7 basic Quality tools use

Cause-and-effect diagram (also known as the "fishbone" or Ishikawa diagram) Check sheet Control chart Histogram Pareto chart Scatter diagram Stratification (alternately, flow chart or run chart)

4- Define the basic tools of quality.

Cause-and-effect diagram (also known as the "fishbone" or Ishikawa diagram):- It’s the method of problem solving used for identify the root cause of the fault or

problems.

Causes are usually grouped into major categories to identify these sources of variation. The categories typically include

People: Anyone involved with the process Methods: How the process is performed and the specific requirements for doing it,

such as policies, procedures, rules, regulations and laws Machines: Any equipment, computers, tools, etc. required to accomplish the job Materials: Raw materials, parts, pens, paper, etc. used to produce the final product Measurements: Data generated from the process that are used to evaluate its quality Environment: The conditions, such as location, time, temperature, and culture in

which the process operates.

Check the fig.1. Below

Check sheet:-

A structured, prepared form for collecting and analyzing data; a generic tool that can be adapted for a wide variety of purposes. When the information is quantitative, the check sheet is sometimes called a tally sheet.

Control chart:-

It’s also known as process-behavior charts. It’s the graph used to study how a process changes over time. Data are plotted in time order. This always has a central line for the average, an upper line as upper control limit & a lower line for the lower control limit. These line are determined from historical data.

Histogram:-

A histogram is a graphical representation of the distribution of numerical data. It is an estimate of the probability distribution of a continuous variable (quantitative variable). It also the most commonly used graph for showing frequency distributions, or how often each different value in a set of data occurs.

Pareto chart:-

It’s the type of chart that contains both bars & a line graph, where individual’s values are represented in descending order by bars & the cumulative total is represented by the lines. It’s the tools which help us to prioritize the major defects from largest to lowest. It works on 80/20 rules, where 80 % of problems may be attributed to 20% of the causes.

Fig 2. Below

Scatter diagram:-

Graphs pairs of numerical data, one variable on each axis, to look for a relationship. It’s a graph in which the values of two variable are plotted among two axis, the pattern of the resulting points revealing any correlation present.

Stratification (alternately, flow chart or run chart):-

A technique that separates data gathered from a variety of sources so that patterns can be seen (some lists replace “stratification” with “flowchart” or “run chart”).

Flow chart: - It’s a type of diagram that represent an algorithm, workflow or process, showing the steps as boxes of various kinds & their order by connecting them with arrows. This diagrammatical representation illustrates a solution model to a given problem.

Run chart: - It’s a line graph of data plotted over time. By collecting & charting data over time, you can find trends or patterns in the process. Because they don’t use control limits. It can’t tell that process is stable.

6. What are the policy? CAP- Corrective Action Policy. DAP- Disciplinary Action Policy. ZTP- Zero Tolerance Policy.

References

https://en.wikipedia.org/wiki/Seven_Basic_Tools_of_Quality