A Study Comparing the Efficacy, Safety and Tolerability of Fixed Dose Combination (FDC) of FF/UMEC/VI With the FDC of FF/VI and UMEC/VI; Administered Once-daily Via a Dry Powder Inhaler (DPI) in Subjects With Chronic Obstructive Pulmonary Disease (COPD)

Inclusion Criteria

• Informed Consent: A signed and dated written informed consent prior to study participation
• Type of subject: Outpatient
• Age: Subjects 40 years of age or older at Visit 1
• Gender: Male or female subjects. A female is eligible to enter and participate in the study if she is of: Non-child bearing potential (i.e. physiologically incapable of becoming pregnant, including any female who is post-menopausal or surgically sterile). Surgically sterile females are defined as those with a documented hysterectomy and/or bilateral oophorectomy or tubal ligation. Post-menopausal females are defined as being amenorrhoeic for greater than 1 year with an appropriate clinical profile, e.g. age appropriate, > 45 years, in the absence of hormone replacement therapy OR Child bearing potential, has a negative pregnancy test at screening, and agrees to one of the following acceptable contraceptive methods used consistently and correctly (i.e. in accordance with the approved product label and the instructions of the physician for the duration of the study - screening to safety follow-up contact): Abstinence; Oral Contraceptive, either combined or progestogen alone; Injectable progestogen; Implants of levonorgestrel; Estrogenic vaginal ring; Percutaneous contraceptive patches; Intrauterine device (IUD) or intrauterine system (IUS); Male partner sterilization (vasectomy with documentation of azoospermia) prior to the female subject's entry into the study, and this male is the sole partner for that subject. For this definition, "documented" refers to the outcome of the investigator's/designee's medical examination of the subject or review of the subject's medical history for study eligibility, as obtained via a verbal interview with the subject or from the subject's medical records. Double barrier method: condom and an occlusive cap (diaphragm or cervical/vault caps) with a vaginal spermicidal agent (foam/gel/film/cream/suppository)
• COPD Diagnosis: An established clinical history of COPD in accordance with the definition by the American Thoracic Society/European Respiratory Society
• Smoking History: Current or former cigarette smokers with a history of cigarette smoking of >=10 pack-years at screening (visit 1) [number of pack years = (number of cigarettes per day / 20) x number of years smoked (e.g., 20 cigarettes per day for 10 years, or 10 cigarettes per day for 20 years)]. Previous smokers are defined as those who have stopped smoking for at least 6 months prior to Visit 1. Note: Pipe and/or cigar use cannot be used to calculate pack-year history
• Severity of COPD symptoms: A score of >=10 on the COPD Assessment Test (CAT) at screening
• Severity of COPD Disease: A post-albuterol/salbutamol FEV1/ Forced Vital Capacity (FVC) ratio of = 1 moderate or severe COPD exacerbation in the previous 12 months OR a post-bronchodilator 50% = 2 moderate exacerbations or a documented history of >=1 severe COPD exacerbation (hospitalized) in the previous 12 months. Note: Percent predicted will be calculated using the European Respiratory Society Global Lung Function Initiative reference equations. Note: A documented history of a COPD exacerbation (e.g., medical record verification) is a medical record of worsening COPD symptoms that required systemic/oral corticosteroids and/or antibiotics (for a moderate exacerbation) or hospitalization (for a severe exacerbation). Prior use of antibiotics alone does not qualify as an exacerbation history unless the use was associated with treatment of worsening symptoms of COPD, such as increased dyspnea, sputum volume, or sputum purulence (color). Subject verbal reports are not acceptable
• Liver function tests: alanine aminotransferase (ALT) 1.5 x ULN is acceptable if bilirubin is fractionated and direct bilirubin 120 beats per minute); sustained or nonsustained ventricular tachycardia (VT); Second degree heart block Mobitz type II and third degree heart block (unless pacemaker or defibrillator had