Learn Before
Detecting Small Performance Improvements with a Dev Set and Metric
Without a specific dev set and metric, a team may have to incorporate a new classifier into an app and manually try the app to judge whether the classifier is an improvement. Having a dev set and metric allows the team to quickly detect which ideas are giving small or large improvements, and therefore quickly decide which ideas to keep refining and which ones to discard.
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Precision (Cat Classifier)
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Combining Precision and Recall into a Single Number
Combining Multiple Metrics via Averaging
Detecting Small Performance Improvements with a Dev Set and Metric
Why should a team use a single-number evaluation metric during model development?
A single-number metric helps a team compare many classifiers efficiently.
A single-number metric gives models a clear preference _____ during development.
Match each development element with its role in evaluating model ideas.
Order the reasoning process for selecting a model with a single-number metric.
Explain how one evaluation number can accelerate a team's development cycle.
Decide how a team should compare a large set of competing classifiers.
What two forms of clarity does a single-number metric provide?
Which comparison method best supports rapid iteration across many candidate models?
A preference ranking can give a development team a direction for progress.
Learn After
Without a dev set and metric, how must a team evaluate whether a new classifier is an improvement?
A dev set and metric allows a team to quickly detect whether new classifier ideas produce small or large improvements.
A dev set and metric lets teams quickly decide which ideas to keep _____ and which ones to discard.
Match each situation to its consequence when evaluating a new classifier.
Order the steps a team must take to evaluate a new classifier when NO dev set or metric exists.
What does having both a dev set and metric enable a team to do that manual app testing does not?
According to Ng, manually testing each new classifier by playing with the app is a fast, efficient evaluation method.
Without a dev set and metric, each time a team develops a new classifier, they must _____ it into the app to evaluate it.
Match each concept to its role in the classifier evaluation process described by Ng.
Order the steps a team follows when using a dev set and metric to evaluate and iterate on classifier ideas.
Analyzing the Efficiency of Dev Sets and Metrics vs. Manual App Testing
Evaluating Classifier Iterations for a Mobile Application
Contrast of Classifier Refinement Decisions