Reserve

If a new change has been requested and is it ok to accomdate that change from reserve ?

Using reserves should always be the last option to cater to actively accepted risks/unforeseen situations. Utilizing them to accommodate CRs is never a good practice.

~ Diba

 See 

Contingencies reserves are values (time and cost, may be resources), which are not spared, these are always acompanied with expected values of prefixed activities.these are of indiviitieal activities.

when we talking about any change request activity, definately it has its own expected estimate and cr too.

Any change is new item/activity- and will definitely push a new bottom up provison.(estimate)

Management reseve is an emergency ((unknown unknowrn risk) reserve - while any requested change , if is the case of  that then it can be utilised.