Hello,
Thanks for posting this project. The scope and implementation, as I understand, is as follows:
1. This app is for users who fulfil orders at different sites.
2. From the backend orders will be assigned to the user. The user will be able to see the details of the order
3. When the user physically executes the orders he might use certain products to fulfil the orders. The user will scan the QR code of the product and attach it to the order.
4. On completing the order the customer will sign in the app. The signature will be captured and stored in the database/server
5. In addition to the app server side PhPs will be created which will have the database connections and calculations to make it secure. We could discuss other options here.
Technically, this will be an Android app with server side PhP scripts. I have done all the technical pieces required for the project and am confident of completing it successfully.
Regds,
Chetan Joshi