## 4 The Second Workshop: Structure and Contents of the STEW Guide
### The Contents of the BIM Service Scoping Guide (BSG)  
At the beginning of a public project, the POs define their vision and requirements for a facility. These are recognized as the Owner's Project Requirements (OPRs), defined as the \"Owner's written document of the functional requirements of the facility and the expectations of how it will be used and operated. These include project and design goals, budgets, limitations, schedules\" [20]. The requirements are then shifted into the design specification of the facility. A designer is then able to define methods and limits in planning the facility to meet the OPRs.  
Defining BIM service scope is a part of the OPRs. This activity has been stated as the OIR in the NIBS [21] or Employer's Information Requirements (EIRs) [24]. While the names are different, both of the above address almost the same contents: \"The information that will be required by the owners/employers from both their own internal team and from external suppliers for the development of the project and for the operation of the completed built asset\". The two references highlight that the OIRs/EIRs should clearly convey the information requirements for BIM suppliers, depict the expected BIM deliverables in terms of documents, model files, and structured information, and define how and when information should be exchanged between project stakeholders in the project life cycle.  
In defining the scope of the BIM, the POs need to understand that the nature of the OIRs/EIRs hinges on not only the complexity of the project, but also the experience and requirements of the POs. An experienced PO can develop very comprehensive OIRs/EIRs, while others can only establish high-level requirements and some straightforward rules, leaving suppliers to suggest how those requirements will be met. To allow BIM to be used successfully on a project, therefore, the POs need to define minimum BIM requirements based on their experience and knowledge, thereby staying within a manageable boundary in the contract with BIM suppliers.  
As stated earlier, the POs should submit an official project feasibility document to the PASC when constructing a facility with a design fee exceeding USD 200,000. According to the \"Guide for Preparing the Pre-Review Request on the Planning of Public Architectural Projects\", the POs are asked to turn in the project outline, including site conditions, project areas and stories, construction purpose, project duration, architectural design strategies, budget, design management methods--including the project delivery methods, i.e., DBB, DB, and TP, but not IPD--and design management organizational hierarchy [35]. Before writing down the project outline, the POs are expected to have already defined the OPRs as well as the OIRs.  
Since the ASIPA's main concern is enhancing the design quality of public buildings, the PASC tends to emphasize project feasibility from the architectural design perspective, with little addressing construction. The POs need to focus on design strategies and management methods in conjunction with diverse project delivery methods. Preparing the BIM service scope is quite different from project to project, in accordance with the delivery methods. Although BIM can be used with all kinds of delivery methods, the benefits of BIM application will become greater when coupled with the distinctive characteristics of each project delivery method [20]. Depending on the delivery methods, the levels of collaboration and financial risks/rewards among project stakeholders can be quite different.