There is no hard and fast rule to evaluate product capability. However, having answers to specific questions can help you assess product capability. 

When developing a new product, it's essential to have a clear understanding of the problem the product is solving (value proposition), who you are solving it for (target market), and how big the opportunity is (market size). Additionally, information on competitors, differentiation, business indicators to measure success, etc., will give you a clear picture of your product.