The phrase "assuming a better" is not complete on its own, but it can be correct and usable in written English when placed in a proper context.
You can use it when discussing hypothetical situations or conditions that are more favorable than the current ones.
Example: "Assuming a better outcome, we can proceed with the project confidently."
Alternatives: "given a more favorable" or "if we consider an improved".
We think RSA can increase earnings per share by more than 50% between 2012-15, without assuming a better macro environment.
In the current study, patients who received PTA lozenges had less weight loss than patients receiving placebo lozenges, assuming a better feeding status of the PTA-group patients (mean difference 1.5 kg).
The sensitivity analysis presented in Table 4 suggested that increasing the discount rate to 6%, utilising the actual Zimbabwean life expectancies, applying equal age weighting or assuming a better capacity utilisation of health facilities had relatively minor effects on the cost-effectiveness ratios.
Of course, the premise of a stopgap assumes a better, permanent and fast-approaching alternative solution.
More important, the 2012 estimates assume a better economy, in which incomes will be higher and more people will therefore be in higher tax brackets.
The current measles vaccination program assumes a better effect of MV when maternal antibody wanes.
Again, if we assume a better over-conversion rate, the estimated global methylation level is closer to the observed fractional methylation levels (Table 2).
We have nudged up our high end 2015/16 pretax profit forecasts as we now assume a slightly better Retail like for like and higher gross margin owing to the recent strength of sterling.
A third misconception is that many people think assuming a loan is always a better way to go.
We obtain a better fit assuming a power law dependence of (R_{mathrm{s}}^{mathrm{sc}}(nu) proptonu^{mathrm{p}}) with an exponent (p approx2.7 pm0.3) at 4K and (p approx3.4 pm0.5) at BT.
