Institutional Review Board

Submission Timeline


The flowchart above shows the typical process involved for each application submitted to NTU-IRB.

To be considered for review by NTU-IRB, all applications should clear through stage 3 above in accordance with the schedule below:

a. Full-Board reviews - by the 15th of each month.

b. Expedited reviews - by Monday 8am each week.

c. Exempt reviews - by Monday 8am each week.


Whilst we endeavour to process each IRB application expediently, delays to approval can occur due to various factors. We list the more common ones below:

- Incomplete submissions
- Applications lacking full details
- Atypical study design or methodology requiring further clarifications
- Inappropriate choice of review category resulting in escalations