It stands for Quantitative Tactical Asset Allocation. If you're curious the link is here
https://papers.ssrn.com/sol3/papers....ract_id=962461. I enjoy being somewhat (but not overly) active in managing my portfolio and started using this method about 5 years ago when it was time to simplify and get somewhat more conservative. It is indeed a timing method, but not very complicated. What I like about it is that it reduces drawdown risk without sacrificing very much in overall performance.
In my case, basically a 60/40 split but I use about a dozen index ETF's to subdivide the asset categories and then trade on a monthly basis (in practice maybe one or two trades/month and often none). Trading costs are basically zero since I'm using the commission free ETF's at Fidelity.
So far have been happy with the results. I compare against Fidelity Global Balanced Fund FGBLX and have done slightly better over the past 5 years.
Larry