Businesses offering professional or technical help provide specialist knowledge and practical support to individuals, organisations and other businesses. The work may involve advising on a particular problem, assessing needs, explaining options or helping to plan and complete a project. Services vary according to the provider's area of expertise and may cover administration, research, business processes, technology or other specialist tasks. Technical support can include diagnosing faults, setting up or maintaining equipment and software, resolving access or performance issues, and guiding users through solutions. Professional support may include preparing documents, carrying out analysis, coordinating work or providing consultancy. Customers should expect the provider to agree the scope of the work, the information or access required, and any relevant limits to the advice or assistance.