Without this first step, precious development dollars will continue to be spent without an analysis of the impact on related infrastructure assets and on the system as a whole. A variety of established statistical models and other techniques as well as tools are available that use rule-based approaches, indicators, random sampling, or statistical outlier detection to aid with maintaining high quality data. Tools like OpenRefine64 can also be used to clean-up data to some extent although there is no substitute for collection of high-quality data to begin with. It's easy to adopt an 'all or nothing' approach to information security.