This report explains the reliability assessment of PARR renovated Instrumentation and control system. In this assessment the technique of component count method has been applied which is one of the most widely applied techniques for the assessment of electronic circuits. The same technique was used in the target reliability assessment of old logarithmic channel. The renovated system contains two log. channels and combined unreliability value further decreases to a range between 1.00E-08 to 1.00E-09 during the same mission time. A graphical response curve has also been plotted to show the clear improvement in the system reliability. (A.B.). 22 tabs, 12 fig.