Quality by design

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Quality by design
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Quality by design is an attitude to progress in a systematic way, which starts with objectives that have already been defined and highlights goods and processes comprehension and process review on grounds of quality risk management and logical science. Quality by design leads off by laying down desired product productivity and by creating a product that complies with those productivity requirements. The ground for forming the manufacturing process are the descriptions of the created product. Each of these parts can influence other ones. For instance, process productivity can supply knowledge relating to manufacturability that may influence product in an alternative device. These points are also connected with particular quality calculations and specific tools[1].

Quality by design is resource to accomplish expected product quality throughout comprehension of the manufacturing processes and better design of the products. For that reason, the key part of that is to analyze the design space. Expected product quality may be easily and assuredly achieved there[2].

Product design

Product design is an imaginative and artistic process of giving the product functions description needed by customers to provide their requirements. Process of product design is a creative way based heavily on practical or technological knowledge. J. M. Juran in his work „Juran on Quality by Design: The New Steps for Planning Quality Into Goods and Services” describes designers as „design engineers, systems analysts, operating heads, and still other planners.” The finished effects of product design are comprised of qualification, procedures, spreadsheets, flow graphs and objectives for the product functions[3].

Usually, the design of products and processes need to be adjusted to the wider hierarchic or functional processes. To illustrated, J. M. Juran used the following instances[4]:

  • „A process for employee selection, training and motivation for quality must be woven into the broader human relations structure.”
  • „A process for qualifying suppliers as to quality must be woven into the broader purchasing process.”
  • „A process for administering quality warranties must be woven into the broader customer service process.”

Applying the quality by design in pharmaceutical business

Through adopting the quality by design by pharmaceutical businesses, the drug development process is moving to a long-range, anticipated science and based on risk attitude from backward-looking quality by testing. There is one problem with quality by design, namely, the goods have already been produced, for that reason if any imperfection is uncovered, it is not easy to repair it. A whole batch needs to be rebuffed or reworked. The foundation promise is the medication substance has to be designed having regarding patient needs the medicine product project design[5].


  1. A. S. Rathore, R. Mhatre, (2011)
  2. G. V. Reklaitis, Ch. Seymour, S. García-Munoz, (2017), p. 71
  3. J. M. Juran, (1992), p. 164
  4. J. M. Juran, (1992), p. 220
  5. W. S. Schlindwein, M. Gibson, (2018), p. 82


Author: Kinga Podlasek