I had the department draw some international comparatives from the U.K., Australia and the United States. Oftentimes they began with estimates that were much lower than the final price tag. They had very similar reasons, because the systems were very old. They were, in some cases, not on any kind of programming that people even had knowledge of anymore and knew how to unpack and figure out how to change.
We took a very conservative approach at the beginning. In fact, the Auditor General noted that. She thought we had underestimated things. She also said that this was reasonable, because we didn't really know what we were getting into. As we unpacked the legacy systems and understood what it was going to take to transform these systems, the estimate approvals went up based on a regular flow of information among ESDC, Procurement and other partners.
Do you want to add to that?