Which statement is incorrect regarding the documentation format of requirements?

The statement about models portraying complex information in a compact form is incorrect because it underestimates the utility and effectiveness of models in requirements documentation. Models, such as data flow diagrams, use case diagrams, or entity-relationship models, are specifically designed to provide a visual representation of complex information, making it more digestible and easier to grasp for stakeholders. This compactness allows for the encapsulation of intricate relationships and processes that might take pages of natural language text to describe fully.

On the other hand, natural language, while user-friendly, can lead to ambiguity and misinterpretation due to its inherently non-specific nature. It can also result in excessively detailed and lengthy documents that make it harder to extract key requirements efficiently. Additionally, while some models may indeed require a level of expertise to interpret accurately, many are crafted in a way that simplifies understanding, particularly for those familiar with the domain or context. Thus, the ability of models to succinctly convey complex information is a significant strength in requirements documentation, making the initial statement about them inaccurate.