The phrase "across four stages" is correct and usable in written English.
It can be used to describe a process, development, or progression that occurs over four distinct phases or steps.
Example: "The project will be implemented across four stages: planning, execution, monitoring, and evaluation."
Alternatives: "through four phases" or "over four steps".
The concerts take place across four stages in Tom Lee Park, along the Mississippi River.
23 to 25 Across four stages in Bangor's Waterfront Park, this festival (americanfolkfestival.com) will feature music and dance from — despite its name — a wide variety of cultures.
Although it's been scaled back since the hugely popular millennium celebrations, Edinburgh's Hogmanay (the biggest in Scotland) still has an impressive line-up across four stages all near the city's castle.
For one weekend only, the city is making way for 250 artists from across the world, who will take part in live painting and illustration battles, plus there's music across four stages and a variety of food stalls.
Land use (via production), trade (via sales, sourcing), logistics (via inventory) and transport are coupled across four stages [40].
This research examines decisions made across four stages of the iteration cycle: Iteration Planning, Iteration Execution, Iteration Review and Iteration Retrospective.
The race, across seven stages from Warsaw to Krakow, offers a great match-up.
In its 16th year running and 10th under its current name, Movement Electronic Music Festival celebrates its biggest year yet, with 141 artists across six stages at Hart Plaza.
With more than 150 bands across five stages, Download speaks volumes about the depth and diversity of the rock and metal scenes in 2013.
Bloodstock soon outgrew the Assembly Rooms: it's now a three-day open-air event across three stages with more than 80 bands.
High profile health leaders will speak across two stages, while feature zones will explore digital health, personalised medicine and new models of care.
