Build and share a library of data and models

A library is a named collection of datasets and models. Keep one for a site, a test programme or a family of equipment, share it with other workspaces, or publish it for anyone to use. Open Libraries in the menu to see all libraries: yours, those shared with you, and the public ones, which include the built-in handbooks.

Make a library

On All libraries, choose New library…. Give it a name and one line on what it holds. You can also say where its contents come from (the source), how to cite it, and any notes. Edit… on the library's page changes these later.

Upload a spreadsheet straight into a library

On your library's page, choose Add… › Upload data…. It opens the same New dataset screen as Data: pick the file (and the sheet), check how the columns are read (x, c, n and the rest), and, if one column names each group, choose it under Split into datasets by to make one dataset per value. The library is already chosen under Also add to library, so saving makes every dataset and adds each one to the library in the same step: all of them, or, if anything stops it, none. You land back on the library with the new entries listed.

New dataset on the Data page has the same Also add to library choice (one of your libraries, or a new one).

Add data and models

Open a dataset or a model and choose Add to library… from its ⋯ menu. It works for any dataset and any kind of model: non-repairable, repairable and accelerated life; fitted to data, entered from parameters, taken from a handbook or built as a prior. Pick one of your libraries, or make a new one in the same step.

The library keeps a copy as it is now. Later edits to the dataset or model in your workspace don't change the copy, so a library stays what you checked. When you do want the newer version, choose Update from the original on the entry: its version number goes up by one. Nothing is ever added to a library for you.

On a library's page each entry opens in place to show more:

• a dataset shows how its columns are read (for example x = Age (hours) · c = Status), how many rows it has, and a preview of its first rows;
• a model shows its headline (for example a B10 life with its 90% lower bound), its parameters, and where it came from: Fitted on ↑ the dataset, when that dataset is in the same library, or words such as From parameters or From MIL-HDBK-217F.

Filter the entries by kind, by tag or by words. Libraries › Data and Libraries › Models list every dataset or model in every library you can see, each with its library.

Share it with other workspaces

On your library's page, choose Sharing… and pick one of three choices:

• Private: your workspace only. This is where every library starts.
• Shared with workspaces: add each workspace's ID. They can view the library and copy from it; only you can change it. Each person finds their own workspace ID, with a Copy button, on their All libraries page.
• Public: anyone can view it, even without an account, and anyone signed in can copy from it.

Publish it

Only public-domain, open or CC BY data may be published, each cited. To make a library public you choose its licence (Public domain, CC0, CC BY 4.0, or Our own data, published under CC BY 4.0), give its source and citation, and tick I have the right to publish this. If anything is missing, the panel says what. Once it's public, Preview as public shows the page as a visitor sees it.

Use an entry

Use this data or Use this model copies the entry into your workspace, and the page links to the copy. A model fitted on a dataset in the same library offers Also copy the dataset it was fitted on. A copy remembers where it came from: its page says From the library … (version n), with a link back. Signed-out visitors see Sign in to use instead.

On the Free plan each library counts as one saved item, however many entries it holds, and a copy counts as the dataset or model it makes.

The built-in handbooks

The published handbooks (industry-average failure rates and probabilities on demand, handbook base rates for electronic parts, and covariate models for mechanical parts) are under Public, marked Built-in. Open one to filter its records, and use a record as a model or as a prior in a fit. The Fit your first model guide describes them in detail.