<a href="/en/Eric%20Ries">Eric Ries</a>: <a href="/en/Lean%20Startup">Lean Startup</a>
「 <a href="/en/If%20you%20don't%20know%20who%20your%20customers%20are%2C%20you%20don't%20know%20what%20quality%20is.">If you don&#39;t know who your customers are, you don&#39;t know what quality is.</a> 」
relevance
 - <a href="/en/over-quality">over-quality</a>
orthographical variants
 - <a href="/en/If%20you%20don't%20know%20who%20your%20clients%20are...">If you don&#39;t know who your clients are...</a>
If you don&#39;t know who the <a href="/en/client">client</a> is, you don&#39;t know what the <a href="/en/(material)%20quality">(material) quality</a> is.
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(6.3.1.1) If you don't know who your customers are, you don't know what quality is