Daily Ops

Daily Ops are a gameplay feature in Fallout 76, introduced in the One Wasteland For All update. Using the game's instancing technology, Daily Ops aim to provide challenging, randomized, and repeatable dungeon-clearing missions for experienced players. Daily Ops are rotated every day at 12:00pm EST.

Details
Each Daily Op takes place in an instanced dungeon, with variable objectives depending on the Daily Op mode. If the objective is successfully completed and enemies within the location are defeated, the player character will be rewarded with ammo, loot, XP, and in-game currency. Daily Ops can be completed solo or with teams of up to four. They can also be completed as much as one wishes, though certain rewards may only be available once per day, resetting at 12:00pm EST.

Daily Op locations, enemies, and enemy mutations are randomized each day. Enemy mutations are unique effects applied to hostiles in Daily Ops that have a significant impact on gameplay.

Rewards
Daily Ops will provide greater rewards if they are completed within certain time limits. There are three tiers for each level of rewards: Initiate (16 minutes or less), Knight (12 minutes or less) and Elder (8 minutes or less).

Once a Daily Op is completed, an after-action Operation Report is provided, showing how fast the mission was completed, as well as which rewards were granted, and the possibility of a rare reward. If no rare reward is received, even after attaining Elder Tier, no additional opportunities are available until the next day when it resets at 12:00pm EST. 
 * Note that attaining a higher tier will reward items from lists of all previous tiers provided those tiers weren't already earned. For example, earning "Elder" rank will reward Elder, Paladin, and Initiate rewards, if those tiers haven't already been earned.

Changelog

 * Prior to Fallout 76 patch 1.5.1.26, the Elder reward tier only had an 80% chance to grant a Daily Op item as opposed to being a guaranteed drop.
 * Vault 96 and the Watoga Civic Center are slated to become additional locations for a Daily Op at some point in the future.
 * Vaults 94 and 96 were originally part of the vault raids, introduced with Nuclear Winter, though vault raids were scrapped in favor of the broader Daily Ops feature.

Behind the scenes

 * Steve Massey, a lead level designer on Fallout 76, led the development of Daily Ops alongside lead UX designer Don Etgeton.