Common tasks

Make only one kind of station slower. This makes the process stations take twice as long. Kinds are explained in Speed.

CraftingSpeed.SetSpeedFactor(Mod.Id, "manufacturingProcess", 0.5f);

Make everything the player crafts one and a half times its normal quality.

if (!CraftingQuality.SetQualityFactor(Mod.Id, 1.5f))
    Log.Warn("Could not set the quality factor.");

Remove your speed and quality changes.

CraftingSpeed.Clear(Mod.Id);
CraftingQuality.Clear(Mod.Id);

Start a craft at every station, and log how many started. The station must already have a recipe selected, as explained in Start and stop.

int started = 0;
foreach (CraftingStationInfo station in Crafting.All())
    if (CraftingStations.Start(Mod.Id, station.Id)) started++;
Log.Info(started + " stations started.");

Pause every station that is running a timed batch, then let them carry on.

foreach (CraftingStationInfo station in Crafting.All())
    CraftingStations.Pause(Mod.Id, station.Id);

foreach (CraftingStationInfo station in Crafting.All())
    CraftingStations.Resume(Mod.Id, station.Id);