Island Workshop
- See also: Isleworks Handicrafts
The Island Workshop is a building added with the Island Sanctuary in Patch 6.2 which provides a place for mammets to create handicrafts out of the materials a player obtains on their island. Isleworks Handicraft production is the primary means of earning 
Seafarer's Cowries. The vast majority of activities in the Island Sanctuary funnel into workshop production.
Workshop Upgrades and Unlock Condition
Workshops are unlocked by following the Island Sanctuary tutorial questline at Sanctuary rank 3.
A hideaway can have up to two Workshops at Sanctuary rank 3, up to three beginning at rank 5, and up to four beginning at rank 15 (after Pathfinder Mk III/VI clears more plots).
Workshops can be upgraded. Upgrades cost various gathered materials and take time to complete (Earth hours). Each upgrade adds an additional 10% value to all items exported from that workshop: items made from a rank V workshop are worth 140% the value of items made form a rank I workshop.
| Building | Unlock Level | Build Time | Island EXP | Materials | Notes |
|---|---|---|---|---|---|
 Workshop I |
3 | None (first) 1-2 hours (others) |
1,425 |
10 |
Allows mammets to create handicrafts to sell for .
|
 Workshop II |
6 | 6-7 hours 1-2 hours (Rank 15) |
2,300 |
15 |
Increases the value of handicrafts produced by this Workshop by 10%. |
 Workshop III |
8 | 11-12 hours 1-2 hours (Rank 15) |
2,760 |
15 |
Increases the value of handicrafts produced by this Workshop by 20%. |
 Workshop IV |
14 | 11-12 hours | 5,225 |
15 |
Increases the value of handicrafts produced by this Workshop by 30%. |
 Workshop V |
19 | 11-12 hours | 12,000 |
15 |
Increases the value of handicrafts produced by this Workshop by 40%. |
Agenda Setting
Island Experience
Island EXP is earned after exporting items by talking to the Tactful Taskmaster. One workshop-hour of crafting awards 70 regardless of other factors. If all hourly slots are occupied, a full 24-hour cycle for one workshop awards 1,680 . If all four workshops are fully occupied for a 24-hour cycle, that is equivalent to 6,720 .
Efficiency
By chaining production of Isleworks Handicrafts that share a category, workshops will operate efficiently. For example, if a production agenda has 
Isleworks Grilled Clam immediately followed by 
Isleworks Baked Pumpkin (both categorized under Foodstuffs), then the Baked Pumpkin craft will receive a bonus, producing two items with the time and material cost of only one.
The bonus is only applied if the second item is different from the first, e.g., Isleworks Grilled Clam → Isleworks Grilled Clam will not receive a bonus. However, Isleworks Grilled Clam → Isleworks Baked Pumpkin → Isleworks Grilled Clam will receive an efficiency bonus for both the Baked Pumpkin and the second Isleworks Grilled Clam craft.
Groove
Each workshop will gain one Groove point from commencing an efficient craft. Each Groove point will give a 1% increase in the export value of the handicraft. Groove is an additional bonus for setting efficient workshop agendas.
The maximum Groove available is determined based on the number of Island Landmarks (up to five) the player has constructed: each landmark will increase the cap to 15, 20, 25, 35, and 45.
Supply and Popularity
The export value of each handicraft is influenced by its supply and popularity for a given season. There are several factors that go into determining these, and determining the most efficient workshop agenda considering supply and popularity is fairly complicated. However, because supply and popularity impacts are the same for all players, one must merely consult a crowdsourced agenda recommendation (see External Links) to maximize efficiency.
Supply
Each handicraft is assigned a hidden "supply point" value determining its relative market supply. Items with lower supply will be worth more cowries. The beginning of each weekly season, all handicrafts are reset to 0 supply. Each item is placed in a certain "supply track" that determine on which cycle (day) and how strongly the item will peak in export value. Weak peaking items have "insufficient" supply and strong peaking items have "nonexistent" supply. Supply points are automatically added or removed to the item in days before, during, or after the peak. It is not possible for items to peak on day 1 of a season.
When exporting items, regular crafts will add 1 supply point, while efficient crafts will add 2 points. These points are applied after exporting the items. If one makes too many of the same item, it will cause a supply excess that will lower the item's value in later days, even if the item was initially on a track to peak in value.
Popularity
Handicrafts with higher popularity will be worth more cowries. This changes each season. The "predicted popularity" of a given handicraft is shown in the workshop interface, which indicates the popularity of the item in the next weekly season.
Supply and Popularity Multiplier
Each item receives a multiplier (supply_popularity) to its export value based on its supply and popularity.
| Supply → Popularity ↓ |
Nonexistent | Insufficient | Sufficient | Surplus | Overflowing |
|---|---|---|---|---|---|
| Supply Points → | -9 and lower | -8 to -1 | 0 to 7 | 8 to 15 | 16 and higher |
| Very High | 2.24 | 1.82 | 1.40 | 1.12 | 0.84 |
| High | 1.92 | 1.56 | 1.20 | 0.96 | 0.72 |
| Average | 1.60 | 1.30 | 1.00 | 0.80 | 0.60 |
| Low | 1.28 | 1.04 | 0.80 | 0.64 | 0.48 |
Export Value
The final export value of an item is given by the following formula:
floor(floor(base_value × (1 + (workshop_rank - 1) / 10) × (1 + groove / 100) ) × supply_popularity)
External Links
- kd3's Island Sanctuary Spreadsheet (original source)
- Overseas Casuals Discord Server: Workshop agenda explanations and in-depth guides