Shadowing Practice: 4 NPI Tips Before You Move Into Mass Production - Learn English Speaking with Video
Creating lesson...
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Remember, and again, this is really all about setting expectations.
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Working on your prototype is not a quality standard.
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Define acceptance criteria in writing before you build mass production.
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Yes, you can test and you can validate the prototype.
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Yes, this is basically the direction I'm going to go in.
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This is what it's going to look like.
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Even rough colors.
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OK, this is not your quality acceptance criteria.
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OK, you really, really need to understand what that means.
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And it is very different to what you're looking at from a prototype point of view.
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OK, I'm just trying to set your expectations of what you should be doing.
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OK, let me pick another one.
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Let's look at this MPI.
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okay if you haven't got a structured mpi process in place with controlled processes with
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phase gates let's say you need to make sure you have you need to make sure
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that you're working with a contract manufacturer that has a solid robust mpi process in place with phase gates
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and they are strong enough in order to say mr customer
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we are not ready to move into the next phase because instead of being, oh yeah, sure, no problems, we're moving, no, no problems.
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And then all of a sudden, we've got 10,000 units with 10,000 problems.
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Really have that MPI process in place.
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One way can check, do your audit.
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Yes. And
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if you're thinking what does the structured mpi process look like
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well we do have a graphic form of the mpi process
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that we follow that you might like to use as reference i think you've got another couple of pro tips
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okay yeah if we've got time yeah no problems track every unit in your validation build okay Now,
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your validation build, again, we're building some just in the next room alone.
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Okay, I've got building 10 units.
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Each one of these has got its own serial number on.
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Guess what?
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It's 1 to 10.
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Okay, but we know exactly what is being tested, when it's being tested, who's testing it, what the results are, and what that unit number is.
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Okay, and each one of those has its own variations within the test output.
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okay now what we're doing here is we're building 10 now this is like the dbt okay
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or tooling validation okay so we're not quite at production yet
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but we have identified some small areas
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that need to be improved in order to that product to go into mass production and be built reliably consistently and robustly.
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Okay, so track.
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Don't just like get 10 prototypes built.
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Yeah, they all work, but this one was like a little bit off.
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Let me send them all back to you.
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And you didn't actually identify which one was wrong.
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Then we're going to get that back or your contract manufacturer or your developer's going to get back and say, I'm going to make the assumption that it's this one
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because it feels different to me as opposed to you didn't mark it up okay
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so serial numbers is really important and particularly on the unseen aspects software
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and firmware okay super super important software and firm
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and have your tracking or serial numbers encoded in okay super important particularly
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when it comes to that debugging
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or cleaning up process okay there you go it's another pro
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tip um moving factory i've talked about this before i'll talk
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about again make sure you understand what the factory you're working
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with has everything in place with respect to qualifying a new
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production run now prototypes to mass production okay that's sort of understandable
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but what if you're going from mass production to mass production now we we have those scenarios as well
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and we will not take a product on until we've done a validation
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or a pilot run even if
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that is a mature product okay why we've got a different
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set of people okay it's a different set of eyes different set of hands actually putting
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that product together okay so this is what you need to insist
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that if you're transferring a product from one factory to another
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or one contract manufacturer to another contract manufacturer you insist
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that they do a small pilot run okay in order to
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prove the new process is correct maybe it's the old process
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but there's a new interpretation of
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that okay then you can actually understand what your failure rates are what your yield rates are
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once you understand that you can do your quality analysis to your eight days
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and all the rest of it but the key thing is you don't just transfer
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and say well i was building 10 000 last month
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and this supplier and everything is perfectly okay i'm going to transfer
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and expect the same okay it doesn't happen okay it's almost like starting from scratch
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but you know at least have
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that pilot run in there okay now a lot of people transfer
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because of cost because of quality issues because of of personnel issues.
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They're all valid, all valid reasons, okay?
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But put cost back on the table if you are transferring 10,000 bill per month,
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10,000 bill per month without that trial, okay?
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The cost of failure of 20%, for example, is huge, absolutely huge.
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All you have to do is like scale back for a little while
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do that pilot run make sure everything is okay then you can ramp back up okay
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so if you're doing that factory transfer be very careful
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Vocabulary and speaking notes for this lesson
This video has 80 sentences and 917 words to shadow. The speech runs for 6:02. The speaker talks at a natural 152 words per minute, close to everyday conversation. 88% of the words are among the 3,000 most common in English; the rest is worth studying before you start.
Key vocabulary in this video
15 words from the video worth learning, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| prototype noun | /ˈpɹəʊtətaɪp/ | An original form or object which is a basis for other forms or objects (particularly manufactured items), or for its generalizations and models. |
| manufacturer noun | /ˌmænjʊˈfæktʃəɹə/ | A person or company that manufactures. |
| validation noun | /ˌvæl.əˈdeɪ.ʃən/ | The act of validating something. |
| serial adjective | /ˈsɪɹ.i.əl/ | Having to do with or arranged in a series. |
| gate noun | /ˈɡeɪ̯t/ | A doorlike structure outside a house. |
| valid adjective | /ˈvælɪd/ | Well-grounded or justifiable, pertinent. |
| acceptance noun | /əkˈsɛp.təns/ | The act of accepting; the receiving of something offered, with acquiescence, approbation, or satisfaction; especially, favourable reception; approval. |
| insist verb | /ɪnˈsɪst/ | To hold up a claim emphatically. |
| expectation noun | /ˌɛk.spɛkˈteɪ.ʃən/ | The act or state of expecting or looking forward to an event as about to happen. |
| output noun | /ˈaʊtpʊt/ | Production; quantity produced, created, or completed. |
| aspect noun | /ˈæspɛkt/ | Any specific feature, part, or element of something. |
| sudden adjective | /ˈsʌd.ən/ | Occurring quickly with little or no warning or expectation; instantly. |
| define verb | /dɪˈfaɪn/ | To determine with precision; to mark out with distinctness; to ascertain or exhibit clearly. |
| mature adjective | /məˈt͡ʃʊ(ə)ɹ/ | Fully developed; grown up in terms of physical appearance, behaviour or thinking; ripe. |
| consistently adverb | /kənˈsɪstəntli/ | In a consistent manner. |
Phrasal verbs you will hear
| Word | Meaning |
|---|---|
| back up verb | To move backwards, especially for a vehicle to do so. |
| clean up verb | To make an area or a thing clean; to pick up a mess; to tidy. |
| get back verb | Return to where one came from. |
Grammar in this video
The structures the speaker uses most, with the exact words from the video:
| Structure | In the video |
|---|---|
| Present perfect have/has + past participle — a past action that still matters now | have identified · i've talked · we've done |
| Passive voice be + past participle — the focus is on what happens, not who does it | being tested · be improved |
Pronunciation to watch
The speaker uses 32 contractions and reduced forms, such as you're, we're, I'm. Say them the short way, as you hear them.
- The “sh” and “zh” sounds: validation /ˌvæl.əˈdeɪ.ʃən/, expectation /ˌɛk.spɛkˈteɪ.ʃən/, interpretation /ɪnˌtɜːpɹəˈteɪʃən/, variation /ˌvɛəɹiˈeɪʃn̩/, assumption /əˈsʌm(p).ʃ(ə)n/
- Long words — get the stress right: manufacturer /ˌmænjʊˈfæktʃəɹə/, validation /ˌvæl.əˈdeɪ.ʃən/, expectation /ˌɛk.spɛkˈteɪ.ʃən/, consistently /kənˈsɪstəntli/, interpretation /ɪnˌtɜːpɹəˈteɪʃən/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Start at 0.75× speed, shadow it sentence by sentence, then go back to normal speed once it feels easy.
- Record yourself and compare with the original, paying attention to words like prototype, manufacturer, validation.
What is the Shadowing Technique?
Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.