Technical support is often subdivided into tiers, or levels, in order to better serve a business or customer base.
Tier/Level 1 (T1/L1)
This is the initial support level responsible for basic customer issues. It is synonymous with first-line support, level 1 support, front-end support, support line 1, and various other headings denoting basic level technical support functions.The first job of a Tier I specialist is to gather the customer’s information and to determine the customer’s issue by analyzing the symptoms and figuring out the underlying problem. When analyzing the symptoms, it is important for the technician to identify what the customer is trying to accomplish so that time is not wasted on "attempting to solve a symptom instead of a problem."
Tier/Level 2 (T2/L2)
This is a more in-depth technical support level than Tier I and therefore costs more as the techs are more experienced and knowledgeable on a particular product or service. It is synonymous with level 2 support, support line 2, administrative level support, and various other headings denoting advanced technical troubleshooting and analysis methods.Technicians in this realm of knowledge are responsible for assisting Tier I personnel in solving basic technical problems and for investigating elevated issues by confirming the validity of the problem and seeking for known solutions related to these more complex issues.However, prior to the troubleshooting process, it is important that the technician review the work order to see what has already been accomplished by the Tier I technician and how long the technician has been working with the particular customer. This is a key element in meeting both the customer and business needs as it allows the technician to prioritize the troubleshooting process and properly manage his or her time
Tier/Level 3 (T3/L3)
This is the highest level of support in a three-tiered technical support model responsible for handling the most difficult or advanced problems. It is synonymous with level 3 support, back-end support, support line 3, high-end support, and various other headings denoting expert level troubleshooting and analysis methods. These individuals are experts in their fields and are responsible for not only assisting both Tier I and Tier II personnel, but with the research and development of solutions to new or unknown issues. Note that Tier III technicians have the same responsibility as Tier II technicians in reviewing the work order and assessing the time already spent with the customer so that the work is prioritized and time management is sufficiently utilized. If it is at all possible, the technician will work to solve the problem with the customer as it may become apparent that the Tier I and/or Tier II technicians simply failed to discover the proper solution. Upon encountering new problems, however, Tier III personnel must first determine whether or not to solve the problem and may require the customer’s contact information so that the technician can have adequate time to troubleshoot the issue and find a solution
This team can analyze the code and data using information from Tier 1 and Tier 2.
Tier/Level 4 (T4/L4)
While not universally used, a fourth level often represents an escalation point beyond the organization. This is generally a hardware or software vendor. Within a corporate incident management system it is important to continue to track incidents even when they are being actioned by a vendor and the Service Level Agreement (SLA) may have specific provision for this. Within a manufacturing organization, the fourth level might also represent the Research & Development.