Monday, March 21, 2011
PhD AECM Candidate Kwang Jun Lee's Proposal Presented and Approved
Functionalizing Product and Process Models for Embedded Commissioning of Buildings
Congratulations to Kwang Jun Lee, PhD AECM Candidate, whose Phd Proposal was presented and approved on the 24th of February!
Kwang Jun Lee's proposal, "Functionalizing Product and Process Models for Embedded Commissioning of Buildings" is described below.
ASHRAE Guideline 0, The Commissioning Process, defines commissioning as "a quality-oriented process for achieving, verifying, and documenting that the performance of facilities, systems, and assemblies meet defined objectives and criteria". However, Building Commissioning (BCx) is often treated as a one-time event to verify that all subsystems for HVAC, plumbing, electrical, fire/life safety, lighting, etc achieve the owner’s project requirement (OPR) as intended by the building owner, architects, and engineers, after construction and delivery to the owner.
There are multiple phases of Building Commissioning (BCx). Building Commissioning (BCx) information is distributed, discontinuous and lost between phases of the building delivery process. The previous research at CMU developed a new approach called embedded commissioning (ECx) to overcome these problems by standardizing a data (product) model in the BCx process. In ECx, the information is embedded in a building product model (BPM) that sustains interoperability between successive building life-cycle (BLC) stages (Türkaslan-Bulbul, 2006). However, this product model is not only difficult to standardize due to frequent changes observed in the BCx process for testing different building configuration (Lee et al., 2007), but is also time-consuming and error-prone process due to non-standard formats used byFunctional Performance Testing (FPT) and Prefunnctional Test (PFT) protocols (Lee et al., 2006).
The objective of this research is to improve efficiency in the BCx process in terms of data interoperability throughout the BLC. This objective will be achieved by building a Just-In-Time (JIT) HVAC model for stakeholders providing relevant data for BCx process and appropriately managing and documenting BCx results. In the first step, I have defined and identified BPM requirements and data types for BCx by colleting background information from literature and pre-defined BCx protocols, and by conducting case studies to determine how protocols are used in real-life testing. It is necessary to make the descriptive BCx process computable in the first place. The linguistic approach based on the Backus-Naur Form (BNF) notation is used to represent the descriptive BCx process. In the next step, I will develop strategies to standardize the BCx data and reduce the modeling time for HVAC entities. as well as a prototype to parse descriptive BCx protocols in natural language and semi-automatically match the parsed BCx data with interoperable standards such as IFC. I will also develop and use an ontology library for achieving semantic consistency. Its results will include deriving product models from BCx process protocols. This approach is called ECx process to product
model (ECx PPM) mapping. This research also investigates the interoperable and standard representations of BCx data. It is expected to reduce a product modeling time and yield a customized product model to meet OPR while improving accuracy and cost effectiveness of BCx.