Solution for Productive Construction & Building Defects Detection


2 types of defects detections are usually carried out. (a) During construction for the purpose of construction quality control and (b) During building operations where Periodic Building Inspection (PBI) is carried out by JTC yearly and Periodic Structural Inspection (PSI) is carried out by third party Professional Engineers (PE) every 5 years.

Defects inspection, together with their documentation, analysis and reporting are very manual, unproductive, and time-consuming process. It is also highly dependent on the inspector’s skill, experience, and alertness. Defects inspection when carried out poorly with missed defects, misinterpretations and poor accuracy not only led to unreliable findings that requires reworks but may also be a potential risk to the construction teams and building occupants.


What if we can develop a solution that can digitalise and automate defects inspection process during construction and periodic building/structural inspections in the following ways to improve detection accuracy, productivity and save costs?

1. Auto-tag key information (metadata) to photos captured on site
    E.g. Project Info, time-stamped, location stamped (BIM & site map) and etc.

2. Identify, match (from database) and classify the defects & non-conformance (NC) from the captured photos automatically.

3. Generate useful information from data to help project and system level planning and decision making.

Defects and NC overviews by classification for follow up actions

   a. Diagnosis/assessment of defects (applicable to structural defects during building operation only)

   b. Building Structural inspection/health Reports

   c. Recommendation for immediate and future actions/rectifications

   d. Track and close rectification works


General Requirement
1.    Practical and cost-effective solution that is deployable in 12 months
2.    Engagement/Partnership of Professional Engineer (C&S) with experience in PSI (Periodic Structural Inspection) under BCA to provide engineering perspective on the requirements for a comprehensive structural inspection (including pre-emptive defects detection) and assessment of structural defects.

Data Requirement
3.    Data acquisition by mobile phone (Photos)
4.    Vendor is responsible to ensure sufficient data are collected and annotated for their solution development to achieve >80% detection
5.    Vendor shall comply with GOVTECH WOG metadata standard
6.    During development and testing solution & data shall be hosted in Government Commercial Cloud (GCC) and/or local Servers.
7.    Vendor shall categorise the data (raw & annotated) into appropriate library files/categories and hand over to JTC at the completion of the project 
8.    All data used shall belong to JTC only

Solution Requirement
9.    Achieve >80% detection accuracy for all confirmed use cases
10.    Vendor shall share all WEIGHTS files/algorithm details with JTC
11.    Solution must comply with JTC and WOG Cybersecurity requirement
12.    All QC reports shall be able to convert and update in JTC CDE in Synchro format
13.    Structural/Building defects diagnosis and assessment report shall be developed to JTC requirement 
14.    Vendor can choose to develop solution for one of 3 scenarios
(a)    During construction for purpose of Quality Control
QC Non- Structural use cases
•    Architectural (10)
•    Mechanical (10)
•    Electrical (10)
QC Structural use cases
•    Column (3)
•    Beam (3)
•    Slabs (3)
•    Walls (3)
•    Ground Floor (3)
(b)    Periodic Building/Structural Inspection
•    Column (5)
•    Beam (5)
•    Slabs (5)
•    Walls (5)
•    Ground Floor (5)
(c)    Both (a) and (b) 

Desired Outcome

  1. Achieve defects and NC detection/ identification/ severity assessment of defects >80% accuracy
  2. Improve overall productivity in construction quality control and/or PBI/PSI inspection >50% 
  3. Auto-generate structural defects and NC reports to JTC’s requirement
  4. Perform diagnosis/severity assessment of each structural defects detected (applicable to building operation).
  5. Identify the building’s overall structural condition at operation stage.
  6. Provide Big Data analytics & insights from cross-inspection database

Possible Solution

Please refer to Annex A

Development Timeframe

12 months.

Additional Info

Evaluation Criteria

  • Time to implementation; Impact factor
  • Price (40%): Value-for-money; level of co-funding
  • Quality (60%): Proposal’s scope of work; Operational feasibility for deployment at the targeted Estate or Facility; Minimal/no nuisance and disruption to operations and/or tenants; Cost benefit analysis; Relevant experiences required to develop and deploy; Commercialisation and/or Implementation plans


Testbed/Trial Site

Project team will link up and facilitate the awarded vendor to collect defects and NC data from JTC’s construction and building sites.


Payment Model

Fixed priced, payment by milestones


Video of Briefing

Click here


JTC Innovation Challenge 2022

Proposal submissions are open from 27 May 2022 02:00PM to 8 Jul 2022 04:00PM