The Problem

ABC Company hired you to write a software to help them managing their projects.

They want to keep track of the planned values and the actual values $($which at the end of the project will be

the final values$).$

Their projects usually have up to five main milestones. For each milestone, they need to store:

$-$ Id $($must be unique$)$

$-$ Name

$-$ Planned cost $($$$)$

$-$ Actual cost $($$$)$

$-$ Planned duration $($hours$)$

$-$ Actual duration $($hours$)$

$-$ Number of employees assigned to the milestone. $($Note that this value will not change throughout

the project execution$)$

$-$ If the milestone is already completed or not

For the project, you need to store:

$-$ Name

$-$ Planned cost $($$$)$

$-$ Actual cost $($$$)$

$-$ Planned duration $($days$)$

$-$ Actual duration $($days$)$

$-$ If the project is already completed or not