The project is part of an industrial PhD and 3XN believes that, among other things, it will help to demonstrate how their architectural signature – the spacious stairwell – has the desired effect, i.e. by becoming the building's unifying feature.

Make this lower case.
the project is part of an industrial phd and 3xn believes that, among other things, it will help to demonstrate how their architectural signature – the spacious stairwell – has the desired effect, i.e. by becoming the building's unifying feature.