The phrase "a bit of guesswork" is correct and usable in written English.
You can use it when referring to a situation where some assumptions or estimations are made due to a lack of complete information.
Example: "Since we don't have all the data, our analysis will involve a bit of guesswork."
Alternatives: "some speculation" or "a degree of estimation."
Assessing what this means for the broader economy requires a bit of guesswork.
I guess at this point papers can write what they want just using a bit of guesswork.
Discoveries in science stem from a mix of hypothesis, experiment, data generation, data analysis, insight and even a bit of guesswork.
"A lot of the time it's a bit of guesswork – like sometimes he stayed and sometimes he went in front of me.
From top to bottom, with a bit of guesswork: Bernie Ecclestone (not actually a driver), 1-1; someone I don't know (maybe Jarno Trulli?), 1-1; Timo Glock (who's German), 2-1); alsoan Sutil (also German), 1-0; Lucas di Grassi 0-0; Bruno Senna, 1-3; Jaime Alguersuari, 1-2; Sebastian Vettel (another German), 0-1, Mark Webber (possibly not taking it seriously), 1-5; RuBarrichellohello, 0-3.
Until the law kicks in, figuring out a company's pay disparity takes a bit of guesswork.
"We have dehydrators and combi ovens that we can set to really precise low temperatures, so it takes away a bit of the guesswork".
The information takes a bit of the guesswork out of using a Roomba, showing the owner where the vacuum has cleaned and where it spent most of its time — a sort of heat map of a home's dirtiest spots.
It is a slippery bit of guesswork that was never taught in Scouting 101.
Most elements of a crime can be analyzed, sifted, and proven beyond doubt in court, but when drugs come into play, so does a fair bit of guesswork and hyperbole.
Most elements of a crime can be analysed, sifted and proven beyond doubt in court, but when drugs come into play, so does a fair bit of guesswork and hyperbole.
