DFMA Redesign to Boost Durability

I have a mature consumer product that sells steadily but doesn’t stand up to real-world abuse as well as it should. My goal is to rethink the mechanical design so the next production run is markedly tougher without driving unit cost through the roof... (Budget: ₹1250 - ₹2500 INR, Jobs: 3D Design, 3D Modelling, CAD / SolidWorks, CAD/CAM, Finite Element Analysis, Mechanical Engineering, Product Design, Solidworks)