Under the Federal Rules of Civil Procedure, “parties may obtain discovery regarding any nonprivileged matter that is 
relevant to any party's claim or defense and proportional to the needs of the case.” FED. R. CIV. PROC. 26(b)(1) (emphasis added); 
see also Pegues v. Coe, Case No. 3:16 CV 239 SMY/RJD, 2017 WL 4922198, at *1 (S.D. Ill. Oct. 31, 2017). The purpose of discovery is to provide a mechanism for making relevant information available to litigants. 
See FED. R. CIV. PROC. 26 Advisory Committee Note to 1980 Amendment. Accordingly, the relevancy requirement is to be broadly construed to include matters “that bear on, or that could reasonably lead to other matters that could bear on, any issue that is or may be in the case.” Oppenheimer Fund, Inc. v. Sanders, 437 U.S. 340, 351 (1978) (internal citation omitted); 
see also FED. R. CIV. PROC. Advisory Committee Note to 1946 Amendment. Nevertheless, the relevancy requirement should be firmly applied, and a district court should not neglect its power to restrict discovery when necessary. 
See Herbert v. Lando, 441 U.S. 153, 177 (1979); Balderston v. Fairbanks Morse Engine Div. of Coltec Industries, 328 F.3d 309, 320 (7th Cir. 2003); Stephenson v. Florilli Transportation, LLC, Case No. 3:18-cv-0103-NJR-DGW, 2018 WL 4699863, at *1 (S.D. Ill. Oct. 1, 2018).