op down and bottom up estimating both use parametric (ratio) estimating, the difference is that... Multiple choice question. Top down looks at the project as a total unit, whereas bottom up looks at individual tasks. There is no difference, the method is the same for both techniques.

Top down looks at the project as a total unit, whereas bottom up looks at individual tasks.

Explanation:

in the case when the top down and the bottom up predicted the usage of the parametric ratio that could be expected that the difference should be that the top down recognize the project and treated as the total unit while on the other hand the bottom up recognized the project on the person to person task or indiviudal task

Therefore the above statement should be considered

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