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<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="en" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p>A <b>unit process</b> is one or more grouped <a href="Unit_operation" title="Unit operation">unit operations</a> in a manufacturing system that can be defined and separated from others.
</p><p>In <a href="Life-cycle_assessment" title="Life-cycle assessment">life-cycle assessment</a> (LCA) and <a href="ISO" class="mw-redirect" title="ISO">ISO</a> 14040,<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> a unit process is defined as "smallest element considered in the life cycle <a href="Inventory_analysis" title="Inventory analysis">inventory analysis</a> for which input and output data are quantified".
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<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
<ul><li><a href="Unit_operation" title="Unit operation">Unit operation</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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<li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.iso.org/obp/ui/#iso:std:iso:14040:ed-2:v1:en:term:3.34">ISO Online Browsing Platform (OBP)-ISO 14040:2006(en)</a></span>
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<ul><li><a href="History_of_chemical_engineering" title="History of chemical engineering">History of chemical engineering</a></li></ul>
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<ul><li><a href="Unit_operation" title="Unit operation">Unit operations</a></li>
<li><a href="Chemical_engineer" title="Chemical engineer">Chemical engineer</a></li>
<li><a href="Chemical_process" title="Chemical process">Chemical process</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Unit_operation" title="Unit operation">Unit operations</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Momentum_transfer" title="Momentum transfer">Momentum transfer</a></li>
<li><a href="Heat_transfer" title="Heat transfer">Heat transfer</a></li>
<li><a href="Mass_transfer" title="Mass transfer">Mass transfer</a></li></ul>
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<ul><li><a href="Chemical_reaction_engineering" title="Chemical reaction engineering">Chemical reaction engineering</a></li>
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<ul><li><a href="Chemical_thermodynamics" title="Chemical thermodynamics">Chemical thermodynamics</a></li>
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<ul><li><a href="Outline_of_chemical_engineering" title="Outline of chemical engineering">Outline of chemical engineering</a></li>
<li><a href="Index_of_chemical_engineering_articles" title="Index of chemical engineering articles">Index of chemical engineering articles</a></li>
<li><a href="Education_for_Chemical_Engineers" title="Education for Chemical Engineers">Education for Chemical Engineers</a></li>
<li><a href="List_of_chemical_engineers" title="List of chemical engineers">List of chemical engineers</a></li>
<li><a href="List_of_chemical_engineering_societies" title="List of chemical engineering societies">List of chemical engineering societies</a></li>
<li><a href="List_of_chemical_process_simulators" title="List of chemical process simulators">List of chemical process simulators</a></li></ul>
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