I'm pretty sure I'd seen Cheaper By The Dozen when I was younger. It's a 1950 movie based on a novel by Frank B Gilbreth Jr and Ernestine Gilbreth Carey. The screenplay is by Lamar Trotti and Walter Lang directed. Lang directed a lot of musicals for Fox in the 40s and 50s. Some of the titles are familiar but I can't say I watched all that many of them. I did see his last film, Snow White And The Three Stooges.
Clifton Webb plays the stern but lovable father to a dozen children. Myrna Loy plays his wife. Dad's an efficiency expert, so there's some gags there. Some more gags about the changing of the times and Dad's social ignorance. You the know the sort of stuff. I found it all pretty entertaining and there's a tearful ending with a nice ray of sunshine poking through those dark clouds.
Here's a little snippet on the Gilbreth's, they were quite the couple.
Frank Bunker Gilbreth was an American engineer, consultant and author, known as early advocate of scientific management and a pioneer of time and motion study, and is perhaps best known as the father and central figure of Cheaper by the Dozen.
Lillian Evelyn Moller Gilbreth was an American psychologist, industrial engineer, consultant, and educator who was an early pioneer in applying psychology to time-and-motion studies. She was described in the 1940s as "a genius in the art of living." Gilbreth, one of the first female engineers to earn a Ph.D., is considered to be the first industrial/organizational psychologist. She and her husband, Frank Bunker Gilbreth, were efficiency experts who contributed to the study of industrial engineering, especially in the areas of motion study and human factors. Cheaper by the Dozen (1948) and Belles on Their Toes (1950), written by two of their children tell the story of their family life and describe how time-and-motion studies were applied to the organization and daily activities of their large family. Both books were later made into feature films.