Levels of complexity are a tool that measures the skills needed to perform a task. Example tasks for workers in a specific job are assigned levels ranging from 1 (basic task) to 4 or 5 (advanced task).
Complexity levels were developed to address the differences in skill needs between occupations (see Example 1). A task’s complexity rating also changes depending on the context (see Example 2).
A bricklayer and a travel counsellor both need the essential skill of writing to do their jobs effectively. However, the type of writing and the complexity differs for each job:
In this example, the complexity level for writing is higher for the travel counsellor because the rating scale considers the following elements of writing:
Travel counsellors use more descriptive and complex vocabulary, making their required writing levels more advanced.
A children’s librarian hosts storytime by reading books aloud to small and large groups of children to capture their attention and entertain them. In this case, the librarian is performing at a complexity level 1 for oral communication due to the narrow range of subject matter and the familiar subject – reading from a book rather than improvising.
If the librarian was invited to present to thousands of her colleagues at a UNICEF convention on children’s literature, she would be performing at a level 4 for oral communication. This presentation would be much more complex and would involve extensive preparation. Also, such a situation would be more threatening due to the large audience and high professional risk.