a pilot study is aiming to understand the user's expectation of abrasion over time of their phones. The result will benefit the hardware quality assurance team to have better understanding about users.
User expected Abrasion over time for mobile phone_ Study Report
Expected Fineness over Time Study<br />Stakeholder: HQA<br />2009.8 by UX lab, Beijing<br />
Research Questions<br />How people perceive the phone’s “Fineness”? E.g. how people define “90% new”, “80% new” etc?<br />What’s people’s acceptable abrasion over time for daily phone usage? Any rules between the “perceived fineness” and using time?<br />
Method<br />Select 12 phones with different abrasion level:<br />8 normal phones (used as daily phones)<br />4 abrasion test phones (made by tumbling abrasion)<br />Recruit users who tend to have high expectations on phone’s abrasion over time via online questionnaire<br />http://www.oqss.com/oqss25/survey/UserData/U1131/S3359.aspx<br />Have users rate the phones on perceived fineness (from 1-10), and estimate how long it has been used based on own experience.<br />For Detailed test protocol refers to:<br />http://metadoc.sonyericsson.net/login_link.asp?doc=1/1523-LXE1100261&rev=latest<br />Discuss with users about their adjustment criteria, and double check if the time estimated is what their basic expectation for phone’s abrasion over time<br />Build predictive equation between perceived fineness and expected using time<br />
Respondent’s Phone usage<br />17/19 users are satisfied with their phones so far<br />Protection measures:<br />Sticking film (贴膜) is widely seen in the respondents (7/8 within 15 months)<br />It’s a simple and cheap way to protect the screen<br />Protective casing or silicon case (保护套)<br />Seen in the first 3 months<br />Inconvenient <br />
Conclusions: Predictive Acceptable Fineness over Months (1-24)<br />For Normal cases:<br />Acceptable Fineness = 9.8 - 0.2 x Month<br /> e.g. for 6 months, the expected fineness is 8.6, which means 86% new<br />For Higher expectation cases(e.g. high end phones):<br />Acceptable Fineness = 10.1 - 0.2 x Month<br />e.g. for 6 months, the expected fineness is 8.9, which means 89% new<br />For lower expectation cases (e.g. low end phones):<br />Acceptable Fineness = 9.5 - 0.24 x Month<br />e.g. for 6 months, the expected fineness is 8.1, which means 81% new<br />Full data analysis refers to: http://metadoc.sonyericsson.net/login_link.asp?doc=2/1597-LXE1100261&rev=latest<br />
Influence Factors of Expected Fineness over Time<br /> Consider the following influence factors when you use the ‘predictive equation’<br />Color and material<br />Price<br />User segment<br />Usage behavior<br />