All I see from these schools is that they don't have standards. If they did, they would have found a way to streamline these things. I saw one girl talk about exam questions. In this age of AI and tech, all you need is to have the syllabus or course outline and form questions there. Have a question bank where different questions will come from so that the teacher will also not know what kind of question will come out. That's what JAMB did and it's not that hard. Both essay and option questions will have like 20 and 300 respectively. The hardest part will be marking. The computer will do the options and the essay will have marking guide. That may be the hardest part of the whole thing. Marking is the hardest part of teaching but if you give a computer the largest part, you have reduced the errors that comes with a human being mistaking option C for D. The human being will only mark the essay part with the marking guide. Give another corps member that work to do. Let your school be attractive to undergraduates so that they can work for you during their breaks. If they do a shoddy job, it will affect their references in future. See how they work for free in 3 months during semester break. They win (experience on their resumes) and you win (cheap, efficient and innovative labour). Stop working like you are in the 19th century. Use technology to help you.
It's not as hard as we make it but if the administrators are not passionate about education, everything is business to them. It's hard but you can still make life easier for your staff. Hire an intern or NYSC staff to help you structure this thing. Let it be their 1 year project for you and you'll be amazed how far they lead you and your school. We like to complicate matters for ourselves, schools run on a cycle and some things are predictable as long as you put standards in place.