The Shop Floor Reporting was completely rebuilt from Apps 7.5 to Apps8 why the SHPEMP and SHPREP components where discontinued.
The windows available in apps 7.5 where not 1-1 replaced why it would be easier to suggest replacement windows if you describe what you are looking for to achieve.
Anyway, the Operation Status per Employee window I think showed ongoing operations. in 21R2 you can search for labor clockings without a stop time on the Shop Floor Clockings page which should give you a similar view.
The Machine Codes window I think showed the different work center resources and their shop floor reporting related settings. In 21R2 most shop floor reporting settings are located in Site/Manufacturing or Work Center pages.