Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optimizing a process of manufacturing a product. In one aspect, the method comprises repeatedly performing the following: i) selecting a configuration of input settings for manufacturing a product, based on a causal model that measures causal relationships between input settings and a measure of a quality of the product; ii) determining the measure of the quality of the product manufactured using the configuration of input settings; and iii) adjusting, based on the measure of the quality of the product manufactured using the configuration of input settings, the causal model.

Abstract: A toilet seat and cover lifter includes a seat lifting assembly and a cover lifting assembly. Each lifting assembly includes a lifting plate, a pair of arms, a pair of counterweights, a vertical handle, and a vertical handle retainer. The seat lifting assembly is installed in the following manner. The lifting plate is mounted to a bottom of the toilet seat. Each arm extends from an end of the lifting plate. Each arm has a slot formed in a length thereof. At least one counterweight is slidably attached to each arm. The counterweights are adjusted by sliding thereof in the slot to reduce the amount force required to move the toilet seat to an upright position. The vertical handle is pivotally attached to an end of either arm. The vertical handle is radially retained inside a vertical handle retainer which is mounted to a side of the toilet tank. The cover lifting assembly is installed in a similar manner to the seat lifting assembly. Two foot pedals with cords may be substituted for the seat vertical handle.