When should one who missed a prayer at night or during the day make it up?

The translation isn't available right now, so the original Arabic is shown.

• The obligation to make up missed prayers and how to do soIslamweb9 April 2007
• Making up missed prayers in congregationIslamweb7 September 2006
• Making up deliberately missed prayers: between obligation and non-obligationIslamweb13 August 2005
• Making up missed prayers according to one's ability and capacityIslamweb25 July 2005
• The view of the majority regarding making up missed prayers: it is more certain to clear one's obligationIslamweb20 July 2004