The phrase "an unanticipated factor" is correct and usable in written English.
It can be used when discussing elements or variables that were not expected or foreseen in a particular situation or analysis.
Example: "The project's delay was largely due to an unanticipated factor that arose during the planning phase."
Alternatives: "an unexpected element" or "a surprising variable".
But in 2013, an unanticipated factor hit Hyundai: With gas prices plunging, Americans began turning in droves to SUVs and CUVs.
In our study, we found an unanticipated factor was the enthusiasm of the health promoters: without instruction from researchers, many health promoters displayed initiative in reminding women of upcoming appointments, contacted patients to reschedule if the previous appointment was missed, or helped provide transportation for women to attend the educational sessions and screening appointments.
These results identify deleterious germline mutation in BRCA1 or 2 as an unanticipated susceptibility factor for HSR to carboplatin.
Families, for example, add a certain amount of additional work and unanticipated factors into the equation.
Population projections and predicting the needs of residents in nursing homes in a 10 to 20 years perspective is a complex task, and is associated with unanticipated factors.
Any of these unanticipated factors could have blown apart the supposed master plan.
These interviews were particularly useful for identifying unanticipated factors that affected the success of the change process.
Clearly, unexpected events or unanticipated factors can influence any large experiment.
However, unanticipated factors in the data may contribute to false positives.
Mutants in a predicted E3 ligase and its target SREBP transcription factor played an unanticipated role in protein production under cellulolytic conditions.
However, an unanticipated but significant overall imbalance in prognostic factors, including the PFI, was found between the two study arms favouring the PLD arm.
