The Department of Revenue shall consult and advise with the governing bodies and tax assessors as to its findings in each county and, after consultation, determine the chosen system of appraisal to be put into effect without delay in order that the assessments for ad valorem taxes in each such county may be equalized at the earliest possible date. Furthermore, a general schedule for completion of the various stages of appraisal for each county shall be agreed upon by the Department of Revenue and respective tax assessor and county governing body within the limits prescribed by this division and shall be forthwith certified by the Department of Revenue.