If W + 1 is noted, which day is being referred to?

In the context of scheduling, "W" typically stands for "week." Therefore, "W + 1" indicates one additional week added to the current week. When you interpret this notation, it represents the day that falls exactly one week from today. This is a commonly accepted shorthand in scheduling and project management, aiding in the quick communication of timeframes.

In contrast, the other options reflect different time frames: "one day," "one month," and "one year" do not align with the concept of adding a week, which is specifically denoted by "W." Therefore, understanding that "W" signifies a week clarifies why "W + 1" refers to one week from today.