IoT devices are everywhere and the variety of functions performed by these wireless devices is enormous, with new application ideas deployed daily. While some companies have designed small wireless devices for years, many companies are now designing their first wireless products. What RF tests do they need to add to their production lines? This could involve a lot of expensive precision RF test equipment. A company may be adding wireless capability to many of their products, and the variety of different products incorporating wireless connectivity can drive test system costs to be a major factor in manufacturing costs. But this test equipment might also be used to test multiple products, amortizing the cost. Either way, many IoT device makers face the same five big challenges in manufacturing test.