The VDMA flatness requirement was included in the FEM 10.2.14 / 4.103 – 1 and from September 2021 in the European standard EN 15 620. It is therefore an official European flatness standard which must be met. This standard was developed at the request and with the approval of VNA forklift truck manufacturers, flooring contractors, engineering firms and universities, and is based on years of scientific research. VDMA is the only standard worldwide that controls all undulations that influence the driving behaviour of the forklift truck. The undulation of a floor is a combination of both (medium) long and short waiviness.
In the Shameless Season 7 episode "Ouroboros," the Gallaghers are thrown into chaos by the sudden return of their mother, Monica, who reveals she is dying, forcing the siblings to face their resentment. Fiona struggles with the financial burden of her laundromat business, while Lip’s sobriety takes a downward turn, and Kevin and V uncover Svetlana’s manipulation of the Alibi. Debbie also faces a DCFS inspection, and the episode's title highlights the recurring, destructive cycle of the family's life.