Hi May,
The Aryana brand only has one other hotel and as such has not developed a set of operating standards for their hotels. The guidelines referred to in the email below are the five-star guidelines from Dubai Tourism which can be found here:
http://classification.dubaitourism.ae/en-us/Enquiry/File/96
They are not as strict as some hotel operator guidelines but the provide a checklist of what is required to call a hotel 5-star in Dubai.
Regards,
Thomas