Complexity is a measure of how complicated a particular product or service is. A more complex process will have more opportunities. A circuit board with 25 parts and 48 solder points is a more complex board than one with just 12 parts and 22 solders and it will have more opportunities. While it is difficult to truly represent complexity accurately, generally complexity can be reasonably estimated by a simple count. This count is referred to as an opportunity count. The opportunity count for the first case is 25 + 48 = 73 and for the second case is 12 + 22 = 34.