INGENIEUR
Sources
Factor Influencing Factors
Label
Design D1 1.Frequent design changes
D2 2.Complicated design
Procurement P1 1.Errors in ordering (over ordering, under ordering)
P2 2. There is no possibility of ordering in small quantities
Materials
handling
Operation
Residual
Human Resource
(worker)
Management
MH1
MH2
MH3
MH4
OP1
OP2
OP3
R1
R2
R3
HR1
HR2
HR3
MT1
MT2
MT3
1.Damage during transportation on-site by the supplier (for
example bricks)
2.Inappropriate material storage leading to damage or
deterioration
3.Unpacked new material supply such as bricks
4.Poor material handling
1.Rework
2.Accidents
3. Inappropriate construction methods applied
1.Over mixing of materials for wet trades due to lack of knowledge
of the requirements
2.Cutting materials to length
3.Leftover material
1.Incompetent workers
2.Poor work attitudes and behaviours
3.Poor workmanship (workers aren’t sufficiently skilled)
1.Lack of on-site material control
2.Lack of proper waste management plan
3.Poor supervision
MT4 4.Lack of coordination among subcontractors
Site condition S1 1.Poor site condition due to the limited space
Factor Label Influencing Factor RII Rank
HR1 Shortage of experienced and skilled workers 0.71 1
HR2 Inattentive worker attitudes and behaviours 0.62 2
D1 Frequent design changes 0.6 3
OP1 Rework 0.58 4
P1 Error ordering (over ordered / under ordered) 0.55 5
MH2
Inappropriate material storage leading to damage or
deterioration
0.52 6
R3 Leftover materials 0.5 7
MT2
R1
Table 1: Influencing factors of refurbishment waste generation by site management practices
Table 2: Relative important index (RII) and the ranking of refurbishment waste generation factors
Lack of proper waste management plan (Poor strategy for
waste minimisation)
Over mixing of materials for wet trades due to lack of
knowledge of the requirement
0.45 8
0.43 9
MT3 Poor supervision 0.42 10
S1 Poor site condition due to limited space 0.42 10
22 VOL 82 APRIL-JUNE 2020