原書以 126 位 participants 的 airline website usability feedback 示範如何把 qualitative responses coding 成 categories/themes,再用 frequency/intensity 建立 heat map。
126 位 participants 被要求描述他們選定航空網站的 usability issues。原書將航空公司依先前 survey 分為 amazing、better、crummy,再把 feedback coding 成 recurring categories。
| Usability theme | 原書比例 |
|---|---|
| Technical issues | 21% |
| Struggled to enter details into booking panel | 15% |
| Struggled to locate search functionality | 10% |
| Could not work out how to proceed to next page | 9% |
| Unable to sort flights by departure time | 8% |
| Struggled to understand content on pages | 8% |
| Unable to enter personal details into forms | 6% |
| Unable to navigate back to previous steps | 2% |
COUNTIF、PivotTable 或 frequency 計算各 theme 出現次數/比例。已列出的八類比例合計為 79%。原書沒有在此段提供其餘 21% 的完整 categories,因此不能推測剩餘 feedback 屬於哪些問題。最高列出的問題是 technical issues(21%),其次是 booking panel details(15%) 與 search functionality(10%)。