"manually maintained" is a correct and usable phrase in written English.
You can use it to describe a process (or system) that requires manual intervention in order to remain accurate and up-to-date. For example, "This financial ledger is manually maintained to ensure accuracy."
Before search became prevalent, I manually maintained a list of bookmarks.
Similarly to GO, ChEBI is manually maintained by a team of expert curators.
MeSH is a manually maintained, controlled vocabulary produced by the National Library of Medicine.
Reference [21] had access to a manually maintained database of Italian researchers as a gold standard, while [22] found a ground truth in Dutch full professor publication lists.
CISMeF is manually maintained.
The snakes were intubated and ventilation with room air was manually maintained by using a neonatal resuscitator.
However, existing tools give the same weight to these connections and require you to manually maintain your network".
During the subsequent restoration phases, plant operators in coordination with system operators attempt to manually maintain a real and reactive power balance.
The researchers had to manually maintain overview of single genes, gene networks or pathways, and gather functional information gene by gene while assessing differences in gene expression levels.
After performing each of the univariable analyzes, we utilized a backwards method, manually, maintaining in the final model the variables with p < 0.05 and those that have been identified with multicolinear association with significant factors (variables) (Hosmer and Lemeshow, 2005).
A single N domain was fitted manually, maintaining the connection to AAA-1, and then hexamerised by applying symmetry in Chimera (Pettersen et al., 2004).> The AAA+ rings have a central opening of ∼30 Å and therefore are not as compact as in one of the previous models (Lee et al., 2003, 2007, 2010), but not as expanded as in the other (Wendler et al., 2007).
