My supervisor corrected the draft of my thesis, inserting a lot of articles here and there. I have doubts if he was correct. Could someone comment on the following sentences?
Over the last decade a lot of companies recognized [the] importance of
data warehousing and business intelligence technologies to their
businesses. Complex queries can significantly decrease [the]
performance of a source system. [The] Availability and quality of data
is crucial for this process. Because of [the] standardization of SQL,
[the] technical heterogeneity could be solved automatically.
I would agree with all the corrections, but it could be argued that not all of them are strictly necessary for it to be grammatically correct. In "[the] importance of data warehousing" it is definitely necessary. In "[the] standardization of SQL" it should be there, but could conceivably be left out, giving it a more generic sense. But on the whole I would leave them all in and agree with your supervisor.
I've noticed that almost all cases where your supervisor added "the" involve constructions with "of". I've been told you'd most often use "the" in such phrases ("the X of Y"), e.g.: the joy of singing, the limitations of the web, the content of this website, the initiatives of NGOs, etc. I've stuck to this rule for quite a long time now and I don't think I've ever been corrected.