For this reason, the functional decomposition process tends to become more unwieldy when systems become large and complex.
(the functional decomposition process; tends; to become more unwieldy when systems become large and complex) (the functional decomposition process; to become; more unwieldy; T:when systems become large and complex) (systems; become; large and complex)
the functional decomposition process the functional decomposition process systems
tends to become become
to become more unwieldy when systems become large and complex
more unwieldy T:when systems become large and complex
large and complex