Ducommun (DCO) appears an attractive pick given a noticeable improvement in the company's earnings outlook. The stock has been a strong performer lately, and the momentum might continue with analysts still raising their earnings estimates for the company.The upward trend in estimate revisions for this aerospace industry supplier reflects growing optimism of analysts on its earnings prospects, which should get reflected in its stock price. After all, empirical research shows a strong correlation between trends in earnings estimate revisions and near-term stock price movements. This insight is at the core of our stock rating tool -- the Zacks Rank.The five-grade Zacks Rank system, which ranges from a Zacks Rank #1 (Strong Buy) to a Zacks Rank #5 (Strong Sell), has an impressive externally-audited track record of outperformance, with Zacks #1 Ranked stocks generating an average annual return of +25% since 2008.For Ducommun, strong agreement among the covering analysts in revising earnings estimates upward has resulted in meaningful improvement in consensus estimates for the next quarter and full year.The chart below shows the evolution of forward 12-month Zacks Consensus EPS estimate:12 Month EPSCurrent-Quarter Estimate RevisionsFor the current quarter, the company is expected to earn $0.76 per share, which is a change of -5% from the year-ago reported number.The Zacks Consensus Estimate for Ducommun has increased 32.46% over the last 30 days, as two estimates have gone higher compared to no negative revisions.Current-Year Estimate RevisionsThe company is expected to earn $2.51 per share for the full year, which represents a change of -10.36% from the prior-year number.The revisions trend for the current year also appears quite promising for Ducommun, with two estimates moving higher over the past month compared to no negative revisions. The consensus estimate has also received a boost over this time frame, increasing 16.1%.Favorable Zacks RankThe promising estimate revisions have helped Ducommun earn a Zacks Rank #2 (Buy). The Zacks Rank is a tried-and-tested rating tool that helps investors effectively harness the power of earnings estimate revisions and make the right investment decision. You can see the complete list of today's Zacks #1 Rank (Strong Buy) stocks here.Our research shows that stocks with Zacks Rank #1 (Strong Buy) and 2 (Buy) significantly outperform the S&P 500.Bottom LineWhile strong estimate revisions for Ducommun have attracted decent investments and pushed the stock 24.5% higher over the past four weeks, further upside may still be left in the stock. So, you may consider adding it to your portfolio right away.Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Ducommun Incorporated (DCO): Free Stock Analysis Report To read this article on Zacks.com click here.