The UK has recently set a new goal of producing two tonnes of market weight pork per sow per year, after determining the UK industry production was lower than the industry average in other countries. There are multiple areas to focus on that could all increase production, and reduce sow cost per kg market weight. The carcass weight sold can be broken into number of pigs multiplied by market weight, and 64% of variation across countries comes from the number of pigs sold (excluding Italy which has a specialized market). Increasing market weight will be restricted by packer and space requirements, but increasing growth rate could aid increased weight. The number of pigs sold depends on pigs weaned, and pigs surviving post-weaning. Decreasing mortality by measures including vaccines will increase pigs sold per sow. The number of pigs weaned/sow/year is the pigs per litter multiplied by the number of litters a sow has in a year, and the most variation comes from the litter sizes rather than the number of litters. As litter size increases, so does pre-weaning mortality, but the increased litter size has a greater impact than mortality. However, if mortality can be lowered, than the carcass kg/sow/year can be increased. Comparing the UK to other counties highlighted the variation, and identified areas in which to improve production.