The phrase "a combination of ways" is correct and usable in written English.
It can be used when describing multiple methods or approaches that are being used together to achieve a particular result.
Example: "The project was successful due to a combination of ways we approached the problem, including teamwork and innovative thinking."
Alternatives: "a mix of methods" or "a blend of approaches."
"Increasing revenue is an important part of a five-year strategic plan which we are currently finalising," said Richardson. "There is a combination of ways we can do this.
Vickers and his four commissioners have come up with a combination of ways to prevent taxpayers stepping in again: the banks should ringfence their retail arms and bolster the capital ratios in those arms to 10% – three percentage points higher than might have been expected.
The ordinances work in one or a combination of ways: by requiring formula businesses to be approved for permits on a case-by-case basis, by not allowing such businesses to open at all in certain defined districts, by capping the number of chains allowed in the town, or by requiring chains to meet certain conditions.
It seemed that providing different resources, assignments, and activities in an online course can create a combination of ways for students to learn as well as to check if they understood the materials correctly.
In the majority of cases the staffing of postnatal wards is provided by a variety of staff (mostly midwives), employed in a combination of ways.
By trying out different approaches, it won't be long before you find one approach or a combination of ways that works best for you.
Nine evaluations characterised the uncertainty around their results: three applied one-way sensitivity analysis [11, 13, 16], Spronk et al. [20] used a combination of one-way, two-way, multi-way and probabilistic sensitivity analyses, and both Briffa et al. [12] and Taylor et al. [10] combined sensitivity analysis and bootstrapping methods.
"What we need is a combination of old ways and new ways," says Dr Drews, who is now a partner at Bear Stearns Health Innoventures.
"It's a combination of the way she uses space, the way she uses sound vibration, the fact that you can move from one loudspeaker to the another and listen to the individual, real human voices speaking to you," Mr. Théberge said, "and yet the whole thing makes an extraordinary, harmonious whole in your head".
We used a combination of one-way, and where appropriate, multi-way sensitivity approaches to analyse predicted effects and costs when subsets of parameters were varied.
We used a combination of one way and (where appropriate) partial multi-way sensitivity analysis to determine how sensitive the findings of this modelled analysis were to various assumptions.
