Table 4
Mean, rank, t-test and significance of the respondents on GB operation and maintenance needs.
| S/n | Items | Total sample | Group 1 | Group 2 | t-cal | Sig. | |||
|---|---|---|---|---|---|---|---|---|---|
|
|
|
|
|||||||
| Mean | Rank | Mean | Rank | Mean | Rank | ||||
| Operating GB requires: | |||||||||
| 53 | Proper documentation of installations and input details | 4.47 | 1 | 4.63 | 1 | 4.39 | 1 | 2.13 | 0.03 |
| 54 | Establishing commissioning or certification criteria of a project | 4.26 | 5 | 4.11 | 6 | 4.34 | 2a | −1.54 | 0.13 |
| 55 | Providing operational and maintenance manual of buildings | 4.29 | 3 | 4.22 | 4 | 4.33 | 4 | −0.76 | 0.45 |
| 56 | Using automated monitors for energy and water consumption | 3.99 | 12 | 3.85 | 13 | 4.07 | 12 | −1.19 | 0.24 |
| 57 | Determining material life cycle | 4.21 | 6 | 4.07 | 7 | 4.28 | 6 | −1.45 | 0.15 |
| 58 | Integrating composting to eliminate disposals | 3.91 | 13a | 3.83 | 14 | 3.96 | 13 | −0.71 | 0.48 |
| 59 | Training building occupants and stakeholders on operation and maintenance of features | 4.32 | 2 | 4.28 | 3 | 4.34 | 2a | −0.37 | 0.71 |
| Maintaining GB requires: | |||||||||
| 60 | Estimating schedules for repairs or replacement | 4.27 | 4 | 4.17 | 5 | 4.31 | 5 | −1.01 | 0.31 |
| 61 | Evaluating components' routine/reactive maintenance | 4.06 | 11 | 3.96 | 11a | 4.11 | 11 | −0.98 | 0.33 |
| 62 | Using non-toxic compounds in cleaning | 3.91 | 13a | 3.96 | 11a | 3.89 | 14 | 0.35 | 0.73 |
| 63 | Avoiding chemicals or materials with volatile organic compounds (VOCs) | 4.19 | 7 | 4.30 | 2 | 4.13 | 10 | 0.97 | 0.33 |
| 64 | Energy auditing of equipment and products before reinstallations | 4.10 | 10 | 4.00 | 9 | 4.16 | 9 | −1.03 | 0.30 |
| 65 | Selecting higher efficiency products during updates | 4.14 | 8a | 3.98 | 10 | 4.22 | 7 | −1.65 | 0.10 |
| 66 | Updating structures with more durable systems | 4.14 | 8a | 4.04 | 8 | 4.19 | 8 | −0.95 | 0.34 |
| Cluster value | 4.16 | 4.10 | 4.19 | −1.13 | 0.26 | ||||
Note: Group 1 refers to lecturers, instructors, teachers and technologists teaching building construction and related trades in tertiary and secondary institutions. Group 2 refers to building industry workers such as engineers, architects, technicians, plumbers, etc with minimum of Senior Secondary certificate in building related trades. a = Equal ranks wherein the next rank is skipped; t-cal = Calculated t-value; Sig. = Level of significance at 0.05.
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