Table 4 Modifications made to address... | Emerald Publishing

Table 4

Modifications made to address overlaps/distinctions in existing knowledge category classifications

Current knowledge category	Source study	Definition/scope	Overlaps or distinctions identified in other studies	Rationale for consolidation/separation	Modified knowledge category proposed in this study
Design performance	Tabesh and Staub-French (2006)	Criteria, if not satisfied, could lead to performance issues in a component/system Primarily relate to the geometric attributes of building components/systems, such as component type, component geometry, slope and location, which impact their main function	Overlaps with - Functionality and efficiency (Guo et al., 2013) - Performance (Hu and Castro-Lacouture, 2018) - System function/performance (Korman et al., 2003) - Slope, component geometry and component type (Wang and Leite, 2016)	All knowledge categories have conceptually similar scope – unified for consistency	Consolidated as “functional requirements”
System requirements	Wang and Leite (2016)	Primarily refers to the systems to which different building components belong	Overlaps with - System function/performance (Korman et al., 2003) - Connections (Tatum and Korman, 2000)	All knowledge categories have conceptually similar scope – unified for consistency	Consolidated as “system requirements”
Clearance	Wang and Leite (2013), Hu and Castro-Lacouture (2018)	Primarily refers to the clearance space given for building components for different purposes, like mitigating heat exchange, controlling vibration issues and minimising conflicts	Distinct from; Insulation/clearance requirements (Wang and Leite, 2016; Tatum and Korman, 2000; Tabesh and Staub-French, 2006; Korman et al., 2003)	Previous studies classified clearance requirements with insulation requirements – Different underlying focus	Separated into “clearance requirements” and “insulation requirements”
Space requirements	Hu and Castro-Lacouture (2018), Wang et al. (2013, 2016), Rocha (2011), Wang and Leite (2016), Tabesh and Staub-French (2006)	Primarily refers to the physical spaces necessary to accommodate different building systems and components	Overlaps with - Installation space (Wang and Leite, 2013; Hu and Castro-Lacouture, 2018; Tabesh and Staub-French, 2006)	Both have conceptually similar scope–unified for consistency	Consolidated as “space requirements”
Access requirements	Hu and Castro-Lacouture (2018), Wang et al. (2013), 2016), Tatum and Korman (2000), Tabesh and Staub-French (2006), Korman et al. (2003), Tatum and Korman (1999)	Primarily refers to the space needed to provide access to building components for their operations and maintenance activities	Overlaps with - Access frequency, and access space (Wang and Leite, 2013, 2016) - Access for operation and access for maintenance (Tatum and Korman, 1999)	All have conceptually similar scope–unified for consistency	Consolidated as “accessibility requirements”
Expandability requirements	Guo et al. (2013)	Primarily refers to all flexibility conditions for adjustments in building system components and their associated space areas	Overlaps with - Adaptability requirements (Rocha, 2011) - Expandability and retrofit requirements (Tatum and Korman, 2000)	All have conceptually similar scope–unified for consistency	Consolidated as “Expandability/retrofit requirements”
Maintainability	Guo et al. (2013)	Primarily refers to the maintenance space and operation routes that need to be taken into consideration	Overlaps with the scope of the following knowledge categories - Space requirement - Accessibility requirement	Maintainability knowledge area includes both space management and accessibility consideration aspects – separated into two	Removed the knowledge area to separate and categorise under “space requirements” and “accessibility requirements”
Coordination with civil works	Guo et al. (2013)	Primarily refers to the process of installing building components in coordination with other civil works	Overlaps with - Sequencing considerations (Korman et al., 2003)	Both have conceptually similar scope–unified for consistency	Consolidated as “sequencing considerations”
Economy requirements	Rocha (2011)	Primarily refers to the cost components/aspects to be considered when making decisions	Overlaps with - Cost requirements (Wang and Leite, 2013, 2016)	Both have conceptually similar scope–unified for consistency	Consolidated as “cost requirements”
Comfort requirements	Rocha (2011)	Primarily refers to all habitability conditions for building users	Contains the scope of the following knowledge categories - Lighting requirements (Wang and Leite, 2013, 2016) - Indoor air quality requirements (Wang and Leite, 2013, 2016) - Indoor environment conditions (Petrova et al., 2018)	All the habitability conditions identified by other studies were categorised under the main knowledge area – comfort requirements	Consolidated as “comfort requirements”
Constructability	Guo et al. (2013)	Mainly represents the factors affecting the sequence of building component installation	Contains the scope of the following knowledge categories - Safety requirements - Access requirements - Configuration (Wang et al., 2013, 2016)	Given its broad scope, the constructability knowledge area was disaggregated into relevant, distinct knowledge aspects for more clarity	Disaggregated into “safety considerations”, “access requirements” and “configuration”

Current knowledge category	Source study	Definition/scope	Overlaps or distinctions identified in other studies	Rationale for consolidation/separation	Modified knowledge category proposed in this study
Design performance	Tabesh and Staub-French (2006)	Criteria, if not satisfied, could lead to performance issues in a component/systemPrimarily relate to the geometric attributes of building components/systems, such as component type, component geometry, slope and location, which impact their main function	Overlaps with- Functionality and efficiency (Guo et al., 2013) - Performance (Hu and Castro-Lacouture, 2018) - System function/performance (Korman et al., 2003) - Slope, component geometry and component type (Wang and Leite, 2016)	All knowledge categories have conceptually similar scope – unified for consistency	Consolidated as “functional requirements”
System requirements	Wang and Leite (2016)	Primarily refers to the systems to which different building components belong	Overlaps with- System function/performance (Korman et al., 2003) - Connections (Tatum and Korman, 2000)	All knowledge categories have conceptually similar scope – unified for consistency	Consolidated as “system requirements”
Clearance	Wang and Leite (2013), Hu and Castro-Lacouture (2018)	Primarily refers to the clearance space given for building components for different purposes, like mitigating heat exchange, controlling vibration issues and minimising conflicts	Distinct from; Insulation/clearance requirements (Wang and Leite, 2016; Tatum and Korman, 2000; Tabesh and Staub-French, 2006; Korman et al., 2003)	Previous studies classified clearance requirements with insulation requirements – Different underlying focus	Separated into “clearance requirements” and “insulation requirements”
Space requirements	Hu and Castro-Lacouture (2018), Wang et al. (2013, 2016), Rocha (2011), Wang and Leite (2016), Tabesh and Staub-French (2006)	Primarily refers to the physical spaces necessary to accommodate different building systems and components	Overlaps with- Installation space (Wang and Leite, 2013; Hu and Castro-Lacouture, 2018; Tabesh and Staub-French, 2006)	Both have conceptually similar scope–unified for consistency	Consolidated as “space requirements”
Access requirements	Hu and Castro-Lacouture (2018), Wang et al. (2013), 2016), Tatum and Korman (2000), Tabesh and Staub-French (2006), Korman et al. (2003), Tatum and Korman (1999)	Primarily refers to the space needed to provide access to building components for their operations and maintenance activities	Overlaps with- Access frequency, and access space (Wang and Leite, 2013, 2016) - Access for operation and access for maintenance (Tatum and Korman, 1999)	All have conceptually similar scope–unified for consistency	Consolidated as “accessibility requirements”
Expandability requirements	Guo et al. (2013)	Primarily refers to all flexibility conditions for adjustments in building system components and their associated space areas	Overlaps with- Adaptability requirements (Rocha, 2011) - Expandability and retrofit requirements (Tatum and Korman, 2000)	All have conceptually similar scope–unified for consistency	Consolidated as “Expandability/retrofit requirements”
Maintainability	Guo et al. (2013)	Primarily refers to the maintenance space and operation routes that need to be taken into consideration	Overlaps with the scope of the following knowledge categories- Space requirement - Accessibility requirement	Maintainability knowledge area includes both space management and accessibility consideration aspects – separated into two	Removed the knowledge area to separate and categorise under “space requirements” and “accessibility requirements”
Coordination with civil works	Guo et al. (2013)	Primarily refers to the process of installing building components in coordination with other civil works	Overlaps with- Sequencing considerations (Korman et al., 2003)	Both have conceptually similar scope–unified for consistency	Consolidated as “sequencing considerations”
Economy requirements	Rocha (2011)	Primarily refers to the cost components/aspects to be considered when making decisions	Overlaps with- Cost requirements (Wang and Leite, 2013, 2016)	Both have conceptually similar scope–unified for consistency	Consolidated as “cost requirements”
Comfort requirements	Rocha (2011)	Primarily refers to all habitability conditions for building users	Contains the scope of the following knowledge categories- Lighting requirements (Wang and Leite, 2013, 2016) - Indoor air quality requirements (Wang and Leite, 2013, 2016) - Indoor environment conditions (Petrova et al., 2018)	All the habitability conditions identified by other studies were categorised under the main knowledge area – comfort requirements	Consolidated as “comfort requirements”
Constructability	Guo et al. (2013)	Mainly represents the factors affecting the sequence of building component installation	Contains the scope of the following knowledge categories- Safety requirements - Access requirements - Configuration (Wang et al., 2013, 2016)	Given its broad scope, the constructability knowledge area was disaggregated into relevant, distinct knowledge aspects for more clarity	Disaggregated into “safety considerations”, “access requirements” and “configuration”