'systematically started' is correct and usable in written English.
It is often used to describe an organized, methodical approach to something. For example, "The company systematically started making changes to their processes in order to become more efficient."
When we find three or four suppressors inactivated, it's almost like tumor has systematically started to knock out that surveillance mechanism.
Because the Salon and the Musée de Luxembourg permitted artists to show only one or two works at their exhibitions, Durand-Ruel took a novel approach and systematically started to hold solo exhibitions of his painters.
The work on sponge natural products was systematically started by who isolated three nucleosides from the Caribbean sponge Cryptotethyacrypta laubenfels.
As they hit the nihilistic coda, Pete very deliberately walked to the edge of the stage and with great purpose, systematically started whacking the top of the Schaefer Beer sign with a nice old sunburst Fender Stratocaster... clear across the length of the stage while the guitar was still plugged in, groaning and screaming.
Parenteral EA was systematically started at the time of reoperation according to the recommendations of our institutional protocol for PP.
The enemy arrives and systematically starts killing the long-oppressed minority to which the brothers belong.
The store attendants run for their lives and the men calmly, systematically, start to break through display cases.
All curves exhibit a clear plateau centered on (nu = 1), which systematically starts at ν = 0.1, but ends at varying values depending on the profile set, around ν = 10 for RP and NP, and around ν = 3 for TP.
The key characteristic of methodological individualism is that it "systematically starts from the concepts which guide individuals in their actions and not from the results of their theorizing about their actions" (1942, 286).
The scaling weights of these two blocks of cross-terms were varied systematically starting from zero and increasing them gradually until an optimal model was obtained (i.e. the most predictive model according to the model's Q2 parameter).
Selection of dwellings was done systematically starting from a random point determined by STATIN.
