Upwards fitting of component values...

[Externet]

Some properly working circuits use, as example 0.1µF for bypassing at an IC power pin;
Some inductors to choke/block spikes or undesired AC/RF may have a value of -say 10µH.

Are those values the necessary ones or the minimum ones ?

As fitting instead 1µF bypass capacitors ; or a larger 100µH inductor for choking undesirable signals. Would their larger values be detrimental to the performance of the circuit ? Or would be actually a little cleaner/better ?

I understand component values are what their calculations show they have to be; but is there in some cases room for raising values ?

 

[ads-ee]

In the case of bypass capacitors, the value directly affects the high frequency response to an IC's switching noise (when an IC draws power from the voltage plane). The whole purpose of bypass capacitors is to provide local energy storage so the voltage at the IC doesn't droop due to large localized transient current demands.

You may want to read a book on high speed digital design, this book an others typically go over the capacitive reactance curves and shows you how multiple capacitors of various values filter a larger frequency range of power plane noise than using a single value. A 1uF capacitor isn't going to do much supply filtering for today's high speed digital designs. In some applications I've seen 0.047uF 0.1uF, and 470uF bulk capacitance used on a single supply rail.