For most product categories, there is no such thing as a ‘standard’ reliability testing plan. It takes an experienced reliability engineer and an understanding of the expected usage type & usage conditions of your product to create a relevant plan.
When it comes to packaging, there are widely-used standards (such as ISTA 1A), but they are probably far from replicating the stresses endured by your products throughout your supply chain.
We are happy to quote for preparing a reliability and durability testing plan that is customized to your product and its intended usage, and for the testing work itself.