If you mean “Umbartha sthāpanā” in Jain context, it is generally understood as the auspicious sanctification or worship of the house threshold (doorstep) before entering a new home. In Jain practice, the threshold is treated as a sacred place, and auspicious symbols such as the Ashta Mangal are traditionally associated with the entrance of a house. ( jsmw.org)

In Jain philosophy, sthāpanā also has a technical meaning: it is one of the four Nikṣepas — Nāma, Sthāpanā, Dravya, Bhāva — and refers to a symbolic स्थापना or representation. For example, a Jain text explains that sthāpanā is the supposition of one object in another, such as regarding an idol of an Arhat as representing the Arhat. ( jainworld.jainworld.com)

So, in simple words:

• Umbartha = threshold / entrance.
• Sthāpanā = symbolic स्थापना / consecration.
• In Jain homes, it is done as an auspicious, respectful custom, not as a central compulsory scriptural vow. ( jsmw.org)

If you want, I can also give the step-by-step Jain vidhi of Umbartha Pujan in simple language.