Build First System Quickly, Then Iterate (C3W2L03) | Summary and Q&A

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August 25, 2017
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DeepLearningAI
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Build First System Quickly, Then Iterate (C3W2L03)

TL;DR

When starting a new machine learning application, it is recommended to quickly build an initial system, iterate, and use bias variance and error analysis to prioritize improvements.

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Key Insights

  • 👻 Building the first machine learning system quickly and iteratively allows for more effective improvement.
  • ⚾ Prioritizing improvements based on analysis of bias, variance, and error helps determine the most worthwhile directions.
  • 😯 Challenges in speech recognition systems include background noise, accents, distance from the microphone, and characteristics of young children's speech.
  • 🏛️ Overthinking and building a complicated system or underthinking and building a too simple system are common pitfalls.

Transcript

if you're working on a brand-new machine learning application one of the piece of advice I often give people is that I think you should build your first system quickly and then iterate let me show you what I mean I've worked on speech recognition for many years and if you're thinking of building a new speech recognition system they're actually a lo... Read More

Questions & Answers

Q: What advice does the speaker provide for building a brand-new machine learning application?

The speaker recommends building the first system quickly and iterating to prioritize improvements based on bias variance analysis and error analysis.

Q: What are some specific challenges associated with speech recognition systems?

Some challenges include handling background noise, accented speech, speakers far from the microphone, and young children's speech with pronunciation and vocabulary differences.

Q: Why is it important to build an initial machine learning system quickly?

Building a quick and dirty system allows for bias variance analysis and error analysis, helping to identify areas of improvement and prioritize the next steps.

Q: In which cases does the advice to build a quick and dirty system apply less strongly?

The advice applies less strongly if the application area has prior experience or if there is a significant body of academic literature available for the specific problem.

Summary & Key Takeaways

  • It is important to build your first machine learning system quickly and iterate to improve it.

  • Prioritizing different techniques, such as robustness to background noise, accents, and speech from young children, can enhance speech recognition systems.

  • The value of the initial system lies in conducting bias variance analysis and error analysis to determine the most worthwhile directions for improvement.

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