START: VISIT WEBSITE

WELCOME PANEL

MENU OPERATION LOOP

ADD ITEM TO CART

MENU PANEL: SELECT ITEMS

IS CART IS EMPTY?

SHOW WARNING: CART IS EMPTY

DELIVERY PANEL: INPUT DETAILS

IS DELIVERY INFO VALID?

SHOW ERROR: INVALID DELIVERY INFO

PAYMENT PANEL: SELECT PAYMENT METHOD

SELECTED PAYMENT METHOD?

GCASH

PROMPT FOR GCASH PIN

IS PIN VALID?

SHOW PAYMENT ERROR

FINALIZE ORDER & CALCULATE TOTAL

CONFIRMATION PANEL: SHOW RECEIPT

USER ACTION?

PLACE NEW ORDER

CLOSE APPLICATION

RESET CART AND DATA

END APPLICATION