Question : why does it take longer ? Team ? Development process ? Strategy (by modernization, I think "rewrite", which is always hard) ? Question : how will su

Question : why does it take longer ? Team ? Development process ? Strategy (by modernization, I think "rewrite", which is always hard) ? Question : how will suffer if you're late ? (no, it's not the end users, it's someone, somwhere who said it was possible, whose career path is tied to the project, etc). Make sure he won't suffer too much, that may give some room on the planning.