"deciding precisely" is a correct and usable phrase in written English.
It can be used when describing the act of making a decision with a high level of accuracy or precision. Example: After carefully analyzing all the data, the scientists spent hours deciding precisely which variables to include in their calculations for the experiment.
Wirth's biggest problem has been deciding precisely what to do with the relatively small amount of money he has available.
I don't know all the considerations that will go into deciding precisely what to say about the completion of that work and when to say it.
The joy of Football Manager 2014 comes in deciding precisely what aspects of management of which you want to take direct direct control, and in navigating its myriad systems to stamp your own philosophy on a club.
It's true, as Jody Freeman and Richard Lazarus say, that States are left to their own devices in deciding precisely which drastic measures to take internally in order to meet EPA's mandatory targets with plans they are required to put in place by 2016.
But this puts pension funds, savers and ultimately companies at risk .Regulators, central bankers and advisors will have the unenviable task this year of deciding precisely how much bank debt is "bail-inable", and how best to make financial wolves compliant sheep.
The second is deciding precisely what philosophical contributions she made.
We decide precisely which words to type to get the information we need.
But the White House hasn't yet decided precisely how the United States would respond if the Israelis do attack.
The reality is that Google decides precisely where Android is going, and what it's going to do.
He said foreign ministers from the US, UK Turkey and other countries are meeting in Paris today "to decide precisely on the next steps".
But settling on a sum for them is the easy bit – as it is local government itself that will have to decide precisely where the axe will fall.
