The following is a table detailing the necessary core functionality elements and the relevant factors for an Accounting Information System for Ravi.

Core Functionality	Relevant Factors
Maintain client contact information	Must contain controls
Maintain information on customers vehicles and vehicle history	Must be a self-monitoring system
Record sales transactions as well as produce invoices and receipts for those transactions	Must have troubleshooting capabilities and fix bugs, errors and glitches.
Record subcontracted activities.	Must have measures to prevent the sharing of sensitive and private customer information
Produce reports for revenue, expenditure for business and taxation purposes	Must have automatic updates and notifications for implementation
Maintain records for current and non-current assets and liabilities	Must have a thorough and detailed manual so that the software can be easily understood and implemented
Produce reports on customer listings, customer details, vendor and supplier listings	Computer hardware must be up to date to be able to install the required software.
Export data electronically	Must be easy to use on a Tablet
Allow for printing of information when necessary

Using the information above, create an evaluation matrix where weighting is applied to each requirement to evaluate the best option of a list of accounting software, namely- QuickBooks, Zoho Books, DEAR Systems, Deltek Vision, SlickPie and MechBooks. Use it to evaluate and rank which accounting software is the most viable options for these requirements.