vco frequency respond

I'm trying to design a vco with output freq. 350MHz-400MHz, what will be my first calculations?
thanks

1st determine the TCXO or OCXO
2nd make freq plan, define the phase detect freq(PDF)
3rd select freq synthesizer, such as ADF4113, ADF4153, interger or fractional
4th calculate PLL,check wether phase noise, power, spurs, harmonics, etc meet requirments or not
5th design schematic and PCB

thanks Tony for sharing

First of all define your specifications..Frequency,Phase Noise,Pulling, Pushing,Kvco,Current Consumption,VCO Topology,Harmonics' Levels,Vcc... etc..

thank you for your respond, it is a good advice
moralehe