Why it matters: an index gap can change what the bid set appears to include.
The Sheet Index isn't just a list. It is a contractual artifact. However, manually flipping through hundreds of pages to verify every single sheet number and title against the master index is tedious and often skipped under tight deadlines. MarkedUp automates this check and flags sheets that are missing from the set or the index, so you catch a missing architectural package before you are four days into a critical bid.