To create effective technical documentation, the writer must analyze three elements that comprise the rhetorical situation of a particular project: audience, purpose, and context. These are followed by document design, which determines what the reader sees. Technical writers strive to simplify complex concepts or processes to maximize reader comprehension. The final goal of a particular document is to help readers find what they need, understand what they find, and use what they understand appropriately. To reach this goal, technical writers must understand how their audiences use and read documentation. An audience analysis at the outset of a document project helps define what an audience for a particular document requires. When analyzing an audience the technical writer typically asks:  Accurate audience analysis provides a set of guidelines that shape document content, design and presentation (online help system, interactive website, manual, etc.), and tone and knowledge level. A technical writer analyzes the purpose (or function) of a communication to understand what a document must accomplish. Determining if a communication aims to persuade readers to “think or act a certain way, enable them to perform a task, help them understand something, change their attitude,” etc., guides the technical writer on how to format their communication, and the kind of communication they choose (online help system, white paper, proposal, etc.). Context is the physical and temporal circumstances in which readers use communication—for example: at their office desks, in a manufacturing plant, during the slow summer months, or in the middle of a company crisis. Understanding the context of a situation tells the technical writer how readers use communication. This knowledge significantly influences how the writer formats communication. For example, if the document is a quick troubleshooting guide to the controls on a small watercraft, the writer may have the pages laminated to increase usable life. Once the above information has been gathered, the document is designed for optimal readability and usability. According to one expert, technical writers use six design strategies to plan and create technical communication: arrangement, emphasis, clarity, conciseness, tone, and ethos. Technical writers normally possess a mixture of technical and writing abilities. They typically have a degree or certification in a technical field, but may have one in journalism, business, or other fields. Many technical writers switch from another field, such as journalism—or a technical field such as engineering or science, often after learning important additional skills through technical communications classes. To create a technical document, a technical writer must understand the subject, purpose, and audience. They gather information by studying existing material, interviewing SMEs, and often actually using the product.