While the proven Zacks Rank places an emphasis on earnings estimates and estimate revisions to find strong stocks, we also know that investors tend to develop their own individual strategies. With this in mind, we are always looking at value, growth, and momentum trends to discover great companies.Of these, value investing is easily one of the most popular ways to find great stocks in any market environment. Value investors use a variety of methods, including tried-and-true valuation metrics, to find these stocks.In addition to the Zacks Rank, investors looking for stocks with specific traits can utilize our Style Scores system. Of course, value investors will be most interested in the system's "Value" category. Stocks with "A" grades for Value and high Zacks Ranks are among the best value stocks available at any given moment.One company to watch right now is ABM Industries (ABM). ABM is currently holding a Zacks Rank of #1 (Strong Buy) and a Value grade of A. The stock has a Forward P/E ratio of 16.52. This compares to its industry's average Forward P/E of 43.40. Over the past 52 weeks, ABM's Forward P/E has been as high as 22.74 and as low as 14.40, with a median of 16.46.These are just a handful of the figures considered in ABM Industries's great Value grade. Still, they help show that the stock is likely being undervalued at the moment. Add this to the strength of its earnings outlook, and we can clearly see that ABM is an impressive value stock right now.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 ABM Industries Incorporated (ABM): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research