Are "y", "m", and "d" the singular and plural abbreviations for "year(s)", "month(s)", and "day(s)"?
1. The project took exactly 5y 2m 18d to complete. (If this is in fact correct, would 'm' be confused for 'meter'?)
2. It was a 5y 2m 18d project.
Again, I was asked for exactness and specificity with regard to accuracy. I don't know why the boss likes this format, but for some inexplicable reason he does. Any help is greatly and deeply appreciated. You folks on this site are amazing. (Sorry, but I had to give you your props.) :-)