"simultaneous development" is a correct and usable term in written English.
You can use it to refer to two or more processes that are happening at the same time. For example, "The simultaneous development of new technology and increased investment in renewable energy sources is creating a greener, more efficient future for our planet."
CVS (Concurrent Versioning System) is an Open Source software package that supports simultaneous development of files by multiple developers.
The gist of the article is that Apple doesn't want a 'meta-platform' to exist between the iPhone and developers, as this would facilitate simultaneous development for competitors' platforms and give Apple less control over the iPhone ecosystem.
FreeBSD developers maintain at least two branches of simultaneous development.
This simultaneously generated patient-reported outcome instrument is one of the few examples of simultaneous development identified in the literature.
Independent and virtually simultaneous development of a significant idea is well known in the sciences.
HOOVER FOR ACTION ON 2 WATERWAYS; Favors Simultaneous Development of Mississippi and St. Lawrence Projects.
Archives|HOOVER FOR ACTION ON 2 WATERWAYS; Favors Simultaneous Development of Mississippi and St. Lawrence Projects.
Masiello does not see their simultaneous development and Louisville's Final Four run as mere coincidence.
Mr. Coll said he did not expect the simultaneous development of the New Caledonia and Labrador projects to depress world nickel prices.
That decline was brought on by the rise of suburban shopping and the simultaneous development of nearby North Michigan Avenue as the new retailer to the carriage trade.
Furthermore, the simultaneous development of several platforms for practical quantum simulation offers the intriguing prospect of verifying, once uncharted territory is reached, one simulator using another.
