Some players are not comfortable with the swingy 3d6 method of rolling ability scores. Mainly because of those nasty low results. And why not? This is supposed to be a game of fantastic action, treasure hunting, monster fighting! You want a larger than life PC. And while I actually love the 3d6 method, I find it much better suited to DCC RPG style funnel play than standard D&D play.
Here's an alternate method that avoids the worst of the negative modifiers while still being random and leaving room for low stats. This is a snippet from Black Pudding #6. This section is meant to augment the OSR Playbook presented in issue #4.