This lesson has not been learned to this day. While in the hospital recovering from cancer surgery earlier this year, a chap next to me and I got to talking. He had been on the phone continually with the company he worked for trying to figure out why they could not fill orders timely. As we talked, it turned out before they went to a new computer system they were manually doing inventory control and they were about 99% accurate at inventory tie and now can not find major pieces of inventory. As we spoke, I asked him some basic question as to control, systems and running the old and new systems to make sure the new system was working and the new procedures were efficient, being understood and followed and both were being continually monitored. Nope, turned off the old and flipped the switch on the new with no overlap. As we talked, it turned out the IT department did not even put bar coding into effect to control inventory in, out, invoicing, costing or anything else. Could not believe in this day any IT department of any company handling large items not using it. The products are not small, being a hospital supply company handling beds, tables, machines such as EKG, MRI, CT Scan, etc. He told me at the last count they could not locate several of the big units worth millions and could not verify if they ever were received and no way to check if they were shipped out. He asked of I could accet a contract to go into the company and work with them but, sadly because of my medical condition I had to refuse. Sad, because that is what I did for quite a few years with several companies.