--- title: "In stock: Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack, 3 pk / 3.3 oz at Fry’s Food 59th Ave Beardsley, Glendale - curbside pickup and delivery | Aisles" description: "Fry’s Food reports Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack, 3 pk / 3.3 oz in stock at Fry’s Food 59th Ave Beardsley, 20220 N 59Th Ave, Glendale, AZ 85308, $12.99, with curbside pickup and delivery; last checked Nov 4, 2026, 10:23 PM MST. Compare reported availability at nearby stores, with prices, pickup options, and last-checked times." canonical: "https://aislesinventory.com/phoenix/glendale/frys-food-59th-ave-beardsley-glendale-66000060/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337" last_updated: "2026-11-05T05:23:36.953Z" --- # Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack, 3 pk / 3.3 oz at Fry’s Food 59th Ave Beardsley Source: https://aislesinventory.com/phoenix/glendale/frys-food-59th-ave-beardsley-glendale-66000060/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337 Updated Nov 4, 2026 (2026-11-05T05:23:36.953Z) Last checked by Aisles: Nov 4, 2026, 10:23 PM MST (2026-11-05T05:23:36.953Z), 17 hours before this page was generated. Page generated: Nov 5, 2026, 3:52 PM MST (2026-11-05T22:52:54.542Z) ![Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack](https://www.kroger.com/product/images/large/front/0003077210337) 20220 N 59Th Ave, Glendale, AZ 85308 As of Aisles' last check on Nov 4, 2026, 10:23 PM MST, Fry’s Food reported Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack (3 pk / 3.3 oz) in stock at Fry’s Food 59th Ave Beardsley, 20220 N 59Th Ave, Glendale, AZ 85308 for $12.99, with curbside pickup; in-store shopping; delivery from this store (timing not specified). Aisles verified this against the store’s own inventory record at the time shown (the retailer’s system for that store, not an in-person shelf count). Purchase link: [Buy at Fry’s Food](https://aislesinventory.com/go/2dcd91cf725d?c=buy) — This is an ordinary link to Fry’s Food. Aisles does not currently earn a commission from Fry’s Food. On this page: - [Availability of Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack at Fry’s Food 59th Ave Beardsley](https://aislesinventory.com/phoenix/glendale/frys-food-59th-ave-beardsley-glendale-66000060/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337#availability) - [Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack at other Phoenix, AZ-area branches: what is reported and how the table is chosen](https://aislesinventory.com/phoenix/glendale/frys-food-59th-ave-beardsley-glendale-66000060/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337#nearby-how) - [Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack at nearby branches, by size or package](https://aislesinventory.com/phoenix/glendale/frys-food-59th-ave-beardsley-glendale-66000060/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337#nearby) - [Where this comes from](https://aislesinventory.com/phoenix/glendale/frys-food-59th-ave-beardsley-glendale-66000060/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337#source) - [Questions shoppers ask](https://aislesinventory.com/phoenix/glendale/frys-food-59th-ave-beardsley-glendale-66000060/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337#questions) - Availability: in stock - Price: $12.99 - Pickup and delivery: Curbside pickup; In-store shopping; Delivery from this store (timing not specified) - Pickup today: Unknown — The retailer did not supply a pickup-ready estimate. - Size: 3 pk / 3.3 oz - Confirmed against the store’s inventory record: Nov 4, 2026, 10:23 PM MST (17 hr ago) - Retailer data updated: Not supplied by the retailer - Store: Fry’s Food 59th Ave Beardsley, 20220 N 59Th Ave, Glendale, AZ 85308 - Retailer product ID: Fry’s Food 0003077210337 > Availability and prices as reported by Fry’s Food, a Kroger company, through the Kroger Developer API. Product links go to the retailer's own site. > Each store reports its own stock. We check every store about once a day. If we can’t check again in time, the item shows as unknown, not in stock. We read the store’s own system. No one looks at the shelf, so an item can sell out after we check. ## Availability of Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack at Fry’s Food 59th Ave Beardsley | Variant | Availability | Price | Pickup and delivery | Last checked | Purchase | | --- | --- | --- | --- | --- | --- | | 3 pk / 3.3 oz · SKU 0003077210337 | in stock | $12.99 | Curbside pickup; In-store shopping; Delivery from this store (timing not specified) | Nov 4, 2026, 10:23 PM MST (2026-11-05T05:23:36.953Z) | [Buy at Fry’s Food](https://aislesinventory.com/go/2dcd91cf725d?c=buy) | ## Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack at other Phoenix, AZ-area branches: what is reported and how the table is chosen Aisles holds 86 size and package observations of Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack (1 distinct size or package) at 86 branches other than Fry’s Food 59th Ave Beardsley in the Phoenix, AZ area: 83 reported in stock or low stock (at 83 branches) and 3 reported out of stock. The table shows 24 of these 86 observations, from 24 of the 86 branches and 1 of the 1 sizes and packages. Each row is one size or package at one branch, with that report's own availability, price and check time. Branches are ordered by distance from Fry’s Food 59th Ave Beardsley (branches without a known location last), then by store. Current in-stock and low-stock reports are taken first, one per branch in turn, preferring sizes and packages not already shown; then out-of-stock, expired and unreported observations. At most 24 rows are shown. 62 size and package observations are not in the table. Leaving a row out says nothing about its stock: each branch link gives every size and package reported at that branch, and the Phoenix, AZ page for Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack compares them all. Size system and audience are shown only where the retailer supplied them. Aisles verified this against the store’s own inventory record at the time shown (the retailer’s system for that store, not an in-person shelf count). ## Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack at nearby branches, by size or package | Branch | Town | Distance | Size / package | Size system and audience | Availability | Price | Last checked (local time) | | --- | --- | --- | --- | --- | --- | --- | --- | | [Fry’s Food 67th Ave Bell Rd](https://aislesinventory.com/phoenix/glendale/frys-food-67th-ave-bell-rd-glendale-66000625/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Glendale, AZ | 2.4 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:23 PM MST (2026-11-05T05:23:24.938Z) | | [Fry’s Food 67th Ave Happy Valley Rd](https://aislesinventory.com/phoenix/glendale/frys-food-67th-ave-happy-valley-rd-glendale-66000073/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Glendale, AZ | 2.9 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock (low stock) | $12.99 (store price) | Nov 4, 2026, 10:24 PM MST (2026-11-05T05:24:34.267Z) | | [Fry’s Food 83rd Ave Deer Valley Rd](https://aislesinventory.com/phoenix/peoria/frys-food-83rd-ave-deer-valley-rd-peoria-66000074/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Peoria, AZ | 3.0 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:24 PM MST (2026-11-05T05:24:10.175Z) | | [Fry’s Food 43rd Ave Bell Rd](https://aislesinventory.com/phoenix/glendale/frys-food-43rd-ave-bell-rd-glendale-66000028/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Glendale, AZ | 3.0 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:23 PM MST (2026-11-05T05:23:00.875Z) | | [Fry’s Food 91st Ave Union Hills](https://aislesinventory.com/phoenix/peoria/frys-food-91st-ave-union-hills-peoria-66000114/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Peoria, AZ | 4.1 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:24 PM MST (2026-11-05T05:24:04.250Z) | | [Fry’s Food 59th Ave Thunderbird](https://aislesinventory.com/phoenix/glendale/frys-food-59th-ave-thunderbird-glendale-66000006/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Glendale, AZ | 4.2 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:22 PM MST (2026-11-05T05:22:21.765Z) | | [Fry’s Food 27th Ave Bell Rd](https://aislesinventory.com/phoenix/phoenix/frys-food-27th-ave-bell-rd-phoenix-66000617/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Phoenix, AZ | 4.5 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:22 PM MST (2026-11-05T05:22:54.785Z) | | [Fry’s Food 19th Ave Union Hills](https://aislesinventory.com/phoenix/phoenix/frys-food-19th-ave-union-hills-phoenix-66000012/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Phoenix, AZ | 5.1 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:23 PM MST (2026-11-05T05:23:15.954Z) | | [Fry’s Food 35th Ave Thunderbird](https://aislesinventory.com/phoenix/phoenix/frys-food-35th-ave-thunderbird-phoenix-66000040/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Phoenix, AZ | 5.3 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:22 PM MST (2026-11-05T05:22:15.542Z) | | [Fry’s Food 43rd Ave Cactus](https://aislesinventory.com/phoenix/phoenix/frys-food-43rd-ave-cactus-phoenix-66000127/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Phoenix, AZ | 5.4 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:22 PM MST (2026-11-05T05:22:06.705Z) | | [Fry’s Food 75th Ave Cactus](https://aislesinventory.com/phoenix/peoria/frys-food-75th-ave-cactus-peoria-66000045/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Peoria, AZ | 5.5 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:22 PM MST (2026-11-05T05:22:30.801Z) | | [Fry’s Food Lake Pleasant Happy Valley Rd](https://aislesinventory.com/phoenix/peoria/frys-food-lake-pleasant-happy-valley-rd-peoria-66000657/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Peoria, AZ | 5.5 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:25 PM MST (2026-11-05T05:25:04.954Z) | | [Fry’s Food Phoenix](https://aislesinventory.com/phoenix/phoenix/frys-food-phoenix-phoenix-66000096/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Phoenix, AZ | 5.6 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:24 PM MST (2026-11-05T05:24:16.134Z) | | [Fry’s Food 35th Ave Peoria](https://aislesinventory.com/phoenix/phoenix/frys-food-35th-ave-peoria-phoenix-66000641/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Phoenix, AZ | 6.9 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:21 PM MST (2026-11-05T05:21:31.984Z) | | [Fry’s Food 51st Ave Olive](https://aislesinventory.com/phoenix/glendale/frys-food-51st-ave-olive-glendale-66000026/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Glendale, AZ | 7.1 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:21 PM MST (2026-11-05T05:21:25.985Z) | | [Fry’s Food 107th Ave Grand Ave](https://aislesinventory.com/phoenix/sun-city/frys-food-107th-ave-grand-ave-sun-city-66000122/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Sun City, AZ | 7.5 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:23 PM MST (2026-11-05T05:23:55.196Z) | | [Fry’s Food Bell Rd 14th St](https://aislesinventory.com/phoenix/phoenix/frys-food-bell-rd-14th-st-phoenix-66000698/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Phoenix, AZ | 8.1 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:22 PM MST (2026-11-05T05:22:42.759Z) | | [Fry’s Food 91st Ave Olive](https://aislesinventory.com/phoenix/peoria/frys-food-91st-ave-olive-peoria-66000056/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Peoria, AZ | 8.2 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:22 PM MST (2026-11-05T05:22:45.764Z) | | [Fry’s Food 43rd Northern](https://aislesinventory.com/phoenix/glendale/frys-food-43rd-northern-glendale-66000136/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Glendale, AZ | 8.4 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:21 PM MST (2026-11-05T05:21:01.835Z) | | [Fry’s Food North Valley Pkwy Dove Valley](https://aislesinventory.com/phoenix/phoenix/frys-food-north-valley-pkwy-dove-valley-phoenix-66000694/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Phoenix, AZ | 9.0 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:25 PM MST (2026-11-05T05:25:33.199Z) | | [Fry’s Food 138th Ave RH Johnson](https://aislesinventory.com/phoenix/sun-city-west/frys-food-138th-ave-rh-johnson-sun-city-west-66000086/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Sun City West, AZ | 9.5 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:25 PM MST (2026-11-05T05:25:07.945Z) | | [Fry’s Food Cave Creek Hatcher](https://aislesinventory.com/phoenix/phoenix/frys-food-cave-creek-hatcher-phoenix-66000609/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Phoenix, AZ | 9.9 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:21 PM MST (2026-11-05T05:21:13.810Z) | | [Fry’s Food 67th Ave Bethany Home](https://aislesinventory.com/phoenix/glendale/frys-food-67th-ave-bethany-home-glendale-66000011/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Glendale, AZ | 10.0 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:21 PM MST (2026-11-05T05:21:04.865Z) | | [Fry’s Food 43rd Ave Bethany Home](https://aislesinventory.com/phoenix/glendale/frys-food-43rd-ave-bethany-home-glendale-66000010/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) | Glendale, AZ | 10.4 mi | [3 pk / 3.3 oz](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337/3-pk-3-3-oz-0003077210337) | — | in stock | $12.99 (store price) | Nov 4, 2026, 10:26 PM MST (2026-11-05T05:26:35.573Z) | [Every size and package of Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack at every Phoenix, AZ store](https://aislesinventory.com/phoenix/products/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-0003077210337) ## Where this comes from Availability and prices as reported by Fry’s Food, a Kroger company, through the Kroger Developer API. Aisles retrieved this store’s own inventory record at the time shown (not an in-person shelf count). Retailer product page: https://www.frysfood.com/p/crest-3d-white-advanced-teeth-whitening-toothpaste-radiant-mint-triple-pack/0003077210337 This is an ordinary link to Fry’s Food. Aisles does not currently earn a commission from Fry’s Food. ## Questions shoppers ask ### Is Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack in stock at Fry’s Food 59th Ave Beardsley? Fry’s Food reported it in stock when Aisles last checked, Nov 4, 2026, 10:23 PM MST. ### How much is Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack at Fry’s Food 59th Ave Beardsley? $12.99 (store price reported by the retailer) as of Nov 4, 2026, 10:23 PM MST. ### Can I get Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack with curbside pickup at Fry’s Food 59th Ave Beardsley? Fry’s Food reports curbside pickup available. ### When did Aisles last check Crest 3D White Advanced Teeth Whitening Toothpaste Radiant Mint Triple Pack at Fry’s Food 59th Ave Beardsley? Nov 4, 2026, 10:23 PM MST. Aisles verifies this store’s listings against its own inventory record about once a day; a listing not re-checked in time is shown as unknown, never as in stock. If you cite this page, please link to it and keep any purchase link as supplied. Methodology: https://aislesinventory.com/methodology