Renowned economist and political commentator has expressed fears that the data collected during the national census could be compromised.
In a blistering tweet on Saturday, Dr Ndii called into question reports that Kenyans could be asked to identify themselves.
He contended that the census was an enumeration exercise, not an identification exercise as it was allegedly turning out to be.
Asking people to identify themselves, he argued, could offer an incentive for unregistered aliens to hit.
"Census is an enumeration, not identification exercise. This is an incentive for people especially unregistered aliens to hide hence data compromised before collection. I respect @KNBStats professionalism but looks like it has finally succumbed. Nothing will survive Uhuruto #SystemYaMajambazi, " Dr Ndii's tweet read.
His words came just hours away from the start of the once in ten years national census.
Kenyans will be counted from Saturday at 6 p.m from their houses.
In a bid to ensure maximum participation, the government has ordered all social joints be closed for the weekend, a move that has elicited mixed reactions
Ndii's intervention is part of a chorus from a clique concerned about how the exercise will be conducted and the nature of questions that will be asked by the enumerators.