Not sure what you mean. Micro Fiche is just miniaturized photos of particular document pages. Snap a photo of a page in front of you and shrink it down, rince and repeat. All they do is reduce the bulk.Looks like lots o' work for sure. But I meant examples of scans and conversions.
OCR is software that allows you to quickly search for specific things in a large series of documents. Example: you have complete ipls and service manuals on microfiche for all chainsaws. You are looking for a specific pt# for a specific saw. Enter those parameters into your newly created database and up pops all the pages where those items are found.