Section A: Respondent Profile A1. Which of the following best describes your current role? Project Manager BIM Coordinator Carbon Data Officer / Manager Site Supervisor Design / MEP Engineer Compliance / Audit Liaison Academic researcher / faculty member Postdoctoral researcher / research fellow Doctoral or master’s student / research assistant Other:
A2. How many years of experience do you have in fields related to construction, carbon management, digitalization, or sustainability? Less than 1 year 1 to 3 years 4 to 6 years 7 to 10 years More than 10 years
A3. What is your level of involvement with the BIBP platform or the MiC project examined in this study? Directly involved in platform use or project implementation Involved in project management, coordination, or decision making Involved in research, evaluation, or technical support Familiar with the project but not directly involved Not directly involved
A4. In which field is your professional experience primarily based in relation to this study? Construction project management BIM / digital construction Carbon accounting / carbon data management Sustainability / environmental management Structural, architectural, or MEP design Site construction / contractor operations Compliance, auditing, or regulatory affairs Academic research related to construction, sustainability, or digitalization Other:
A5. Before BIBP was implemented, which system(s) did you use to manage carbon data? (Select all that apply) Spreadsheets (Excel / Google Sheets) Commercial BIM software (without carbon module) IoT or sensor-based monitoring systems Paper records Other:
Section B: Data Collection-Related Communications The following questions ask about communications you initiated or received specifically to collect raw carbon data — for example, requesting material quantities from contractors, asking suppliers for emission factor certificates, or following up on site measurement data. Please do NOT include automatic platform notifications or general project coordination messages. B1. (Before BIBP) approximately how many emails or instant messages per week did you send or receive for carbon data collection purposes? 0 1–3 4–6 7–10 11–15 More than 15
B2. (Before BIBP) approximately how many phone calls per week did you make or receive for carbon data collection purposes? 0 1–3 4–6 7–10 11–15 More than 15
B3. (Currently, after BIBP) approximately how many emails or instant messages per week do you send or receive for carbon data collection purposes? 0 1–3 4-6 7-10 11-15 More than 15
B4. (Currently, after BIBP) approximately how many phone calls per week do you make or receive for carbon data collection purposes? 0 1–3 4–6 7–10 11–15 More than 15
B5. Which platform features have most reduced your data collection communications? (Select all that apply) Automated IoT data capture (reduces need to request field measurements) Real-time carbon monitoring dashboard (reduces follow-up queries) Supplier / contractor self-upload portal Blockchain-verified emission factor database Other: Reduction has not been noticeable
B6. (Optional) What types of data collection communications still remain, and why?
Section C: Carbon Data Compliance-Related Communications The following questions ask about communications related to verifying the accuracy or compliance of carbon data — for example, responding to auditor queries, resolving discrepancies between platform records and physical measurements, or preparing documentation for regulatory reporting. Please do NOT include initial data collection requests (covered in Section B). C1. (Before BIBP) approximately how many emails or instant messages per week did you send or receive related to carbon data compliance or verification? 0 1–3 4–6 7–10 11–15 More than 15
C2. (Before BIBP) approximately how many phone calls per week did you make or receive related to carbon data compliance or verification? 0 1–3 4–6 7–10 11–15 More than 15
C3. (Currently, after BIBP) approximately how many emails or instant messages per week do you send or receive related to carbon data compliance or verification? 0 1–3 4-6 7-10 11-15 More than 15
C4. (Currently, after BIBP) approximately how many phone calls per week do you make or receive related to carbon data compliance or verification? 0 1–3 4–6 7–10 11–15 More than 15
C5. Which platform features have most reduced your compliance-related communications? (Select all that apply) Blockchain immutability (reduces disputes about data authenticity) Automated smart contract verification Full audit trail and traceability records IFC-compatible data export for regulatory submission Other: Reduction has not been noticeable
C6. (Optional) What types of compliance communications still remain, and why?
Section D: Overall Perception Please rate your level of agreement with each statement below. D1. BIBP has reduced my need to contact others to obtain carbon data. 1 Strongly Disagree
5 Strongly Agree
D2. Since using BIBP, I encounter fewer disputes about the accuracy of carbon data. 1 Strongly Disagree
5 Strongly Agree
D3. The blockchain audit trail reduces the number of follow-up queries from auditors or regulators. 1 Strongly Disagree
5 Strongly Agree
D4. Overall, BIBP has noticeably reduced the communication workload associated with carbon data management. 1 Strongly Disagree
5 Strongly Agree