This really can't be overstated. Proper name resolution is integral to successfully using PDQ Deploy and PDQ Inventory. If you manage your DNS server(s), it really helps to perform basic house cleaning like scavenging old records, consolidating or deleting old zones, etc.
If you've seen errors such as Target Name Mismatch, Failed To Connect to ADMIN$, The Target Account Name Is Incorrect or other messages that basically state that a computer or target couldn't be reached then you may have a DNS issue.
The see also section below provides some good reading material on the subject.
Blog - DNS is A Four Letter Word
Blog - Healthy DNS Will Keep PDQ Inventory and PDQ Deploy Hummin' Along