Minimum requirements to determine the best solution

• Total lifecycle cost: including initial cost, installation, training, and recurrent cost for maintenance and support.
• Maintainability: the ease of how (cost and effort) the software can be modified to
  correct faults, improve performance or other attribute or adapt to a changed environment.
• Interoperability: ihis includes additional support required to integrate with existing systems. It also includes flexibility to accommodate changes over time and among multiple systems.
• Portability: usability of the same software in different environments. A computer environment can include hardware, operating systems, and interfaces with other software, users and programmers.
• Scalability: ability to support future growth and increased through put.
• Availability and accessibility: robust and redundant (fault tolerant) software to achieve required level of service without disruption from software failure.
• Reusability: ability to make repeated use of the software for additional requirements with minimum additional cost.
• Functionality/performance: ability to achieve operational requirements effectively and efficiently.
• Security: ability to protect system data and operational environment from loss or compromise.
• Additional criteria include: vendor viability, licensing restrictions, product market share, customer recommendations, frequency of upgrades, and potential obsolescence.