The phrase "a complex venture" is correct and usable in written English.
You can use it when describing a project or undertaking that involves multiple intricate elements or challenges.
Example: "Launching a new product in a competitive market is a complex venture that requires careful planning and execution."
Alternatives: "a complicated undertaking" or "a multifaceted project."
Designing measures for the reduction of energy consumption in urban areas is a complex venture indeed.
VaR is a method of evaluating the probability of a gain or loss by a complex venture, by examining the stochastic behavior of its components.
Value at risk (VaR) is a method first introduced in the financial sector for modeling potential loss in a complex venture.
Multi-instrumentalist composer River Tiber has been described (by us, 11 months ago) as a complex venture between Bon Iver, BADBADNOTGOOD, and a satirical Twitter.
"The other style is: Education is a pretty complex venture and we have to work together urgently but thoughtfully to help all kids learn".
This is a very complex venture, as one has to account for the different sources and methods to gather data, hospital-specific case mixes, nature of critical incidents and so forth.
Unlike previous labor-stoppages in pro sports, namely, the acrimonious Major League Baseball strike in 1994, the N.F.L. lockout has failed to elicit much rage from the fans, who have either behaved like mature adults who recognize that football is a complex business venture, or like addicts awaiting their next hit.
The running of a physician's office has become a complex business venture" [ 1].
More importantly, investors such as Draper say the platform will help them invest in startups based in India, something they would normally avoid given the country's existing complex venture investing rules.
Mr. Sherman is teamed up with Mr. Canning in See-Saw Films — it is a reference both to their ups and downs and to their lives in opposing time zones — and in a complex of ventures that helps finance and distribute movies in the Britain, Australia and elsewhere.
Although financially not profitable, the Concorde, which was taken out of service in 2003, proved that European governments and manufacturers could cooperate in complex ventures and that they remained at the technical forefront of aircraft development.
