B . 7 Applying decision trees
The decision trees in Figure 5 to Figure 9 were considered in determining the number of PCBUs that may follow each option described . This informed the modelling undertaken to arrive at the costs to PCBUs , governments and workers described in this document .
This section lists key assumptions that informed this process .
B . 7.1 Global assumptions
B . 7.1.1 Engineered stone PCBU assumptions �
Engineered stone PCBUs are currently either working with engineered stone only or engineered stone and natural stone .
� Engineered stone PCBUs predominantly fabricate and install new engineered stone . �
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For the purposes of the model , it has been assumed that a very small number of engineered stone PCBUs would remove , repair or modify previously installed engineered stone , i . e . it is assumed for this model that no engineered stone PCBUs would have need to participate in a licensing framework for work with legacy products .
Given most engineered stone PCBUs already work with both natural stone and engineered stone , a decision to switch to natural stone is not expected to incur significant costs .
� A decision to switch to non-stone products will require investment in new equipment and processes . � Worker displacement would only occur when PCBUs cease operating . �
Workers are expected to behave similarly , irrespective of whether they work for small , medium or large businesses .
B . 7.1.2 Other industry PCBU assumptions �
For the purposes of this model it has been assumed that other industry PCBUs are not involved in the fabrication or installation of new engineered stone products .
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For the purpose of this model it is assumed that other industry PCBUs work with ( remove , repair or modify ) engineered stone as part of the primary activity and as such the impact on their business is solely related to how they work with legacy product .
For these reasons it is assumed that the impact on other industry PCBUs will not be dependent on the three proposed options ( but will be impacted solely by the licensing framework for work with legacy products ).
As such , it is assumed no PCBUs in this group will exit the industry or make employees redundant as a result of the prohibition options , given working with engineered stone is not their primary activity and overall demand levels have not changed for their services .
A licence under the licensing framework for work with legacy products is expected to cover all work with previously installed engineered stone regardless of crystalline silica content .
DECISION REGULATION IMPACT STATEMENT Prohibition on the use of engineered stone
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