MAP-01-011 HFI Technical Guide - Human Factors Integration ...

MAP-01-011 – HFI Technical Guide (STGP 11)• Interviews can be used at any stage in the design process.• The use of SME’s as interviewee’s gives interviews the potential to be verypowerful.• The interviewer has full control over the interview and can direct theinterview in way. This allows the collection of specific data.• Response data can be treated statistically.• A structured interview offers consistency and thoroughness (DTC173 -Stanton & Young 1999).• Interviews are a very flexible technique.• Interviews have been used extensively in the past for a number of differenttypes of analysis.• Specific, structured Human Factors interviews already exist, such as ACTAand the Critical Decision Method.• Disadvantages• The construction and data analysis process ensures that the interviewtechnique is a very time consuming one.• The reliability and validity of the technique is difficult to address.• Interviews are susceptible to both interviewer and interviewee bias.• Transcribing the data is a laborious, time consuming process.• Conducting an interview correctly is a difficult thing to do.A3.2.2QuestionnairesQuestionnaires offer a very flexible way of quickly collecting large amounts ofdata from large amounts of subjects. Questionnaires have been used in manyforms to collect data regarding numerous issues within ergonomics and design.Questionnaires can be used to collect information regarding almost anything atall, including usability, user satisfaction, opinions and attitudes. More specifically,questionnaires can be used in the design process to evaluate concept andprototypical designs, to probe user perceptions and to evaluate existing systemdesigns. A multitude of questionnaires are available to the Human Factorspractitioner and the system designer. Established questionnaires such as thesystem usability scale (SUS), the Questionnaire for User Interface Satisfaction(QUIS) and the Software Usability Measurement Inventory (SUMI) are availablefor practitioners to apply to designs and existing systems. Alternatively, specificquestionnaires can be designed and administered during the design process, inorder to determine user requirements and to evaluate design concepts.May 2006 Page A3-12 Issue 4