$1\mathrm{.}1$ In the context of construction projects, critically analyze the importance of the project planning ph within the overall project life cycle. In your response, briefly highlight the key objectives and outcomes this phase, using relevant examples to support your discussion.

$1\mathrm{.}2$ Bennett $(2003)$ emphasized the importance of construction managers taking the external environme into account during project planning to minimize the impact of deviations. Considering this, analyze the primary trade$-$offs that project managers must carefully manage when overseeing construction projects, utilizing relevant frameworks in your response.