Source: VMware KB: Update sequence for vSphere 6.0 and its compatible VMware products
Just assembling some KB article references for client documentation. This is one of the best KB articles for getting started.
Use the sequence from here and then work on the details with each individual product as you go.
Don’t forget to check out the VMware Product Interoperability Matrix – https://www.vmware.com/resources/compatibility/sim/interop_matrix.php.