With earnings season now in full swing, let's look at which of the Dow Jones Industrial Average's (DJINDICES:^DJI) components are set to report earnings this week and what investors will probably be focusing on in those reports.

We'll hear from a number of the Dow's components this week. First up is McDonald's (NYSE:MCD), which is scheduled to release results on Monday before the opening bell rings. Wall Street's estimate for earnings per share is $1.40, which will be important for the company to beat, though perhaps it's not the most important detail of the report. This has been a rough year for the fast-food restaurant, which has struggled with beating same-store sales figures. For most investors, that will be what they want to see in the report.

DuPont is on tap before the opening bell on Tuesday, with AT&T (NYSE:T) is set to report after the closing bell and post EPS of $0.68. We've seen a number of changes within the telecom industry over the past few months, and it should be interesting to see whether any of the smaller players have taken market share away from AT&T or Verizon, the top two players.

Boeing (NYSE:BA) is set to report before the bell on Wednesday, and with all the recent problems the company has had with its 787 Dreamliner, investors are surely going to be picking through this report with a fine-toothed comb. One thing they'll definitely want to see is whether the backlog report amount has increased or decreased over the past few months. The number we get will tell us whether Boeing is still selling planes or whether the Dreamliner's battery problems and most recent fire have affected sales.

On Thursday, 3M (NYSE:MMM) kicks things off before the opening bell and is expected to post earnings per share of $1.70. With the company's previously expected top-line growth of around 2% to 6%, it will be interesting to see if management can pull off that feat as major world economies are still struggling. With China's GDP growth continuing to slow, I'll be looking at how 3M performed in that market and see whether any headway is being made in Europe, as the whole EU remains flat on a GDP basis.

On Friday, no Dow components are reporting. Give yourself a break and take the day off from the market.