navsection: userguide
title: "Running a workflow using Workbench"
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+{% comment %}
+Copyright (C) The Arvados Authors. All rights reserved.
+
+SPDX-License-Identifier: CC-BY-SA-3.0
+{% endcomment %}
A "workflow" (sometimes called a "pipeline" in other systems) is a sequence of steps that apply various programs or tools to transform input data to output data. Workflows are the principal means of performing computation with Arvados. This tutorial demonstrates how to run a single-stage workflow to take a small data set of paired-end reads from a sample "exome":https://en.wikipedia.org/wiki/Exome in "FASTQ":https://en.wikipedia.org/wiki/FASTQ_format format and align them to "Chromosome 19":https://en.wikipedia.org/wiki/Chromosome_19_%28human%29 using the "bwa mem":http://bio-bwa.sourceforge.net/ tool, producing a "Sequence Alignment/Map (SAM)":https://samtools.github.io/ file. This tutorial will introduce the following Arvados features: