Quantifying UX
The primary difficulty in breaking in to the project planning process is that few technology leaders have worked with UX resources and have not yet built an appreciation for the discipline. Clients and other stakeholders also see this as an add-on resource that adds cost to the project without tangible benefit.
This paper addresses these concerns by highlighting specific benefits that have been observed after integrating UX into technology efforts.

Reduce Development and Maintenance Costs

Technologists know that it is faster and less expensive to deliver an application if all requirements are fully articulated before starting the project. It is also uncommon for this to be fully realized. Experts have spent time specifically quantifying the impact of incomplete knowledge of the project requirements:
  • In a widely used textbook, Robert Pressman explains that for every dollar spent researching functionality during the design phase, $10 is required to alter the functionality during development, and $100 or more after release.1
  • It is estimated that roughly 50% of development time is devoted to the user interface. Incorporating a strong UX strategy up front is critical to limiting development time.2
  • Of all IT projects initiated, 5-15% are abandoned before or shortly after launch. Many are delivered late or well over budget. An IEEE report identified twelve common factors of failure, three of which could be mitigated by UX activities: badly defined requirements, stakeholder politics, and poor communication among customers, developers, and users.3
  • Dr. Clare-Marie Karat, noted usability expert, has demonstrated that 80% of maintenance costs are due to unforeseen user requirements after initial launch.4
  • The IEEE report noted earlier also estimates that 40-50% of work by software specialists is avoidable rework.
Our collective experience confirms these studies. Working with a broad range of Fortune 500 companies across technology platforms, we have universally observed that even a quick user-centric study upfront sets a project on a more successful course.

Stronger User Adoption Leads to Increased Revenue

The days when users would suffer through a sub-optimal experience to gain some degree of efficiency are long gone. For any given need there are dozens of potential applications. Providing an experience that aligns seamlessly with user behavior and needs leads to greater degrees of adoption and use. IBM uses a rule of thumb that says, “every dollar invested in ease of use returns $10 to $100”.6
While we have not yet quantified that specific level of return, in our experience there is a measurable difference between efforts that involve significant time creating user-centric experience and those that did not. For example, one award-winning application we designed for GE Healthcare resulted in significantly higher adoption and use, as well as lower training costs. Below is further support that a user-centric experience will lead to cost savings and increased revenue:
  • A broad survey by Forrester Research found that 15.8% fewer customers are likely to consider switching providers when offered an improved user experience.7
  • Bank of America applied usability principles while redesigning their online banking enrollment application. As a result, successfully completed applications increased by 45%.8
  • Forrester found that 14.4% more customers are willing to purchase from a company that provides a superior experience.9
  • United Airlines modeled the traveler’s experience to inform a new website design. The resulting website increased online ticketing by over 200%.10
  • Following extensive research, the redesign of Wal-Mart’s shopping cart resulted in 214% increase in the number of visitors, and over 160% increase in sales.11
  • After redesigning the architecture of a state government portal site, user success of finding information increased from 72% to 95%, reducing time to find information by 62%, and resulting in higher user satisfaction ratings. Revenue also increased by at least $552,000.12
  • Anthropologie realized a 24% increase in conversion rate by implementing a new, easy-to-use checkout system.13
  • From our experience, Jones Lang LaSalle saw online leads and referrals increase from virtually zero to over 1,500 following a full user-centric redesign in 2008.


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1 Pressman, R.S. (1992). Software Engineering: A Practitioner’s Approach. McGraw Hill, NY.
2 Weinschenk, S. (2005). Usability: A Business Case. Human Factors International, published on Web.
3 Charette, R. (2005). Why Software Fails. IEEE, published on Web.
4 Karat, C. (1997). Cost-justifying usability engineering in the software life cycle. In Helander, M., Landauer, T., and Prabhu, P. (Eds), Handbook of Human-Computer Interaction, Elsevier Science, Amsterdam.
5 Ten Things We know to be True. Google.com. n.d. Web. May 10, 2013.
6 Cost justifying ease of use. IBM.com/software/ucd. n.d. Web. May 17,
7 Guattieri, M. (2009). Best Practices in User Experience Design. Forrester, published on the Web.
8 Hirsch, S. (2004). Leveraging Business Value: How ROI Changes User Experience. Adaptive Path Reports, published on the Web.
9 Guattieri, M. (2009). Best Practices in User Experience Design. Forrester, published on the Web.
10 Karat, C. (2005). Return on Investment in Usability of Web Applications. In Bias, R.G. Cost Justifying Usability. Morgan Kaufmann, San Francisco.
11 ibid.
12 Foreker Design (2005). Usability ROI: Case Studies. Published on the Web.
13 Plesco, G. (2008). Designing Superior Shopping Experiences. User Interface Resource Center, published on the Web.